The best 350 mm diamond blades, compared.
Top pick: OX Pro V10 350 mm Best value: OX Contractor CG15 350 mm – Lowest captured price, about £30.92, with a 20 mm bore, a 15 mm turbo segment and EN 13236 for the bricks, slabs, roof tiles and concrete paviours the listing names. Updated October 2026.
A 350 mm (14 inch) diamond blade is a steel disc with a diamond rim for petrol cut-off saws and some masonry saws, used in the UK on concrete, kerbs, paving, blocks and brick. It is not a 300 mm blade and not a 115–230 mm grinder disc. The saw must be built for a 350 mm wheel. Stihl UK specifies 300 mm for the TS 410. Match diameter, bore (20 mm or 25.4 mm), the named material, segment height, and whether EN 13236 is stated. Life in metres is not published, and two listings mix reviews from smaller discs, so stars alone are a weak guide. Turbo or laser segments, on both bores, the OX and the OX, are sold as a faster, cleaner cut. A concrete bond and an asphalt bond are different products at the same diameter. How to choose is set out in the [saw fit guide](/hub/tool-accessories/350mm-diamond-blade/sub/350mm-diamond-blade-saw-fit).
A 350 mm (14 inch) diamond blade is a steel disc with a diamond rim for petrol cut-off saws and some masonry saws, used in the UK on concrete, kerbs, paving, blocks and brick.
18 products checked · 58 hrs invested · +21,400 readers
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Personal buying guide
Question 1 of 2
What limits the choice on a 20 mm saw?
The OX Pro V10 listing presents a 350 mm turbo blade with a 20 mm bore, 10 mm segment and cooling holes for concrete, reinforced concrete, metal, brick, granite and Indian stone. It is the only row here that explicitly names metal, which gives it a distinct use case on paper. The captured price is £72.70, the highest in the comparison. The listing is internally inconsistent, however: the title, item type and V10-350/20 model point to 350 mm, while the included-components line says 300/20 mm. Its 4.8 stars from 28 ratings are also weak evidence for this exact blade because most captured reviews discuss 115 mm or 230 mm discs. Wet or dry use and EN 13236 are not stated in the captured fields. Check the physical diameter and markings before fitting it; without that confirmation, the apparent rating does not justify the premium.
Pros
Cons
Best for: A buyer who needs the stated metal claim and can verify that the delivered disc is the 350 mm V10-350/20.
Less suitable: Anyone choosing solely by the 4.8-star line or unable to resolve the 300 mm versus 350 mm conflict.
Specifications
Common questions
Is the bore 20 mm?
The model number is V10-350/20 and the title says 350 mm. The included-components line instead says 300/20 mm, so check the disc in the box.
Do the 4.8 stars describe this 350 mm blade?
The listing shows 4.8 from 28 ratings. Most of the UK review texts in the captured file describe 115 mm or 230 mm discs.
Does the listing say it cuts metal?
Yes. The bullets name metal as well as reinforced concrete, brick, granite and Indian stone. Wet or dry use is not stated. That metal line is not a structural-steel wheel.
The GVHAKG is the only blade in this set whose listing explicitly names asphalt alongside concrete, brick, block and stone. It is specified at 350 mm with a 20 mm bore, 24 segments, a 15 mm segment height and a 3.2 mm thickness. Wet and dry cutting are both stated, and the captured price is £50.82. That specification makes it the relevant row when asphalt is part of the job rather than an unlisted assumption. The 4.7-star score from 46 ratings needs caution because many captured UK reviews describe 115 mm packs, not this 350 mm blade. Reinforced concrete, EN 13236 and undercutting protection are not stated in the captured listing. Choose it for the named material coverage, not because the mixed-size rating proves service life.
Pros
Cons
Best for: A 20 mm saw cutting asphalt as well as the concrete, brick, block or stone named by the listing.
Less suitable: Buyers who need an explicit reinforced-concrete claim, EN 13236 wording, or size-specific review evidence.
Specifications
Common questions
Does this blade name asphalt?
Yes. The listing says wet and dry cutting of concrete, asphalt, brick, block and stone, at 350 mm with a 20 mm bore.
How many segments does it list?
The specification bullet says 24 segments, 15 mm high and 3.2 mm thick.
Are the 4.7 stars only about this 350 mm disc?
The listing shows 4.7 from 46 ratings. Many UK reviews in the captured file describe 115 mm packs rather than this 350 mm title.
The PRODIAMANT 350 mm blade combines a 20 mm bore with a 15 mm turbo segment for concrete, reinforced concrete, granite, kerbs, brick and masonry. Its listing permits wet or dry cutting and states a 3.5 mm blade thickness, 24 segments and compliance with EN 13236. The 20 mm bore makes it the direct match among these listings for a saw specified for that arbor size, provided the machine also accepts a 350 mm wheel. Its 4.3-star score comes from 1,078 ratings shared with the 25.4 mm variant, so it is not a clean measure of this exact bore. One recorded UK complaint says the blade did not fit a Stihl saw without an unprovided washer, which makes a flange check sensible before use. Asphalt is not among the materials named by the listing. At the captured price of £54.78, it is the most complete concrete-focused listing in this comparison rather than the cheapest.
Pros
Cons
Best for: Concrete, reinforced concrete, kerbs and masonry on a 350 mm saw with a confirmed 20 mm arbor.
Less suitable: Asphalt cuts, 25.4 mm arbors, or buyers who have not checked the saw flanges.
Specifications
Common questions
What bore is this PRODIAMANT blade?
The listing states a 20 mm bore on a 350 mm disc with a 15 mm turbo segment and a 3.5 mm thickness.
Can it cut wet?
The listing says the blade is for dry cutting and wet cutting on concrete, reinforced concrete, granite, kerbs, bricks and masonry.
Does the listing mention EN 13236?
Yes. The product text says the blade is tested in accordance with EN 13236.
This PRODIAMANT uses the same 350 mm, 15 mm turbo-segment format as the 20 mm version but has a 25.4 mm bore. The listing names concrete, reinforced concrete, brick and masonry, with granite and granite kerbs also appearing in its bullets. Wet and dry cutting and EN 13236 are stated, while the blade thickness is listed as 3.5 mm. Its captured price of £51.83 is slightly below the 20 mm version, but price does not solve an arbor mismatch. No reduction ring is listed, so it is not a direct fit on a 20 mm shaft. The 4.3-star, 1,078-rating line is shared with the 20 mm listing and should not be read as bore-specific evidence. Asphalt is not named, making this a concrete and masonry choice only when the machine genuinely takes 25.4 mm.
Pros
Cons
Best for: Concrete and masonry work on a 350 mm saw with a confirmed 25.4 mm arbor.
Less suitable: A 20 mm shaft without a suitable approved bush, or work that requires asphalt to be named.
Specifications
Common questions
Will this fit a 20 mm arbor?
The listing states a 25.4 mm bore. It does not say a reduction ring is included, so it is not a direct fit on a 20 mm shaft.
Is the star rating only for this bore?
The captured file shows 4.3 from 1,078 ratings, the same pool as the 20 mm PRODIAMANT listing. The text does not separate the bores.
Does it state wet cutting?
Yes. The listing says universal dry cutting and wet cutting.
The OX Contractor CG15-350/20 is the lowest-priced blade here at £30.92, with a 350 mm diameter, 20 mm bore and 15 mm turbo segment. Its listing covers bricks, slabs, roof tiles and concrete paviours, so its stated remit is general masonry rather than reinforced concrete or asphalt. OX describes this line as an entry-level general-purpose blade and states EN 13236. There is no customer-review line in the captured amazon.co.uk data, so there is no review evidence to balance against the specifications. Wet or dry use is not stated, and the Amazon thickness field appears to repeat the 15 mm segment height rather than provide a kerf. That missing information matters if your saw or method requires a declared cutting mode or blade thickness. It is the best-value option on captured price for straightforward listed materials, but only after those omissions have been checked.
Pros
Cons
Best for: Budget-conscious cutting of the listed bricks, slabs, roof tiles and concrete paviours with a 20 mm saw.
Less suitable: Buyers who need review evidence, a declared wet-cutting mode, or an explicit asphalt or reinforced-concrete claim.
Specifications
Common questions
What size is the OX Contractor blade?
The title and bullets state diameter 350 mm and bore 20 mm, model CG15-350/20, with a 15 mm turbo segment.
Is there a star rating?
The captured amazon.co.uk file has no customer-review line and no review text, so there is no star rating for this blade.
Which materials does the listing name?
Bricks, slabs, roof tiles, and other concrete paviours and products. Asphalt and wet or dry use are not stated.
The editorial score is a 0–100 figure from the captured amazon.co.uk listing and review signals for these five blades. Product and material specification accounts for 35 points, machine-fit clarity for 20, review evidence for 20, value at the captured price for 15, and listing consistency plus safety information for 10. Scores lose points when ratings combine other sizes, listing fields conflict, a review line is absent, or wet or dry use, kerf, maximum speed or EN 13236 wording is missing. A high Amazon star rating is not treated as evidence for the exact 350 mm variant when the captured reviews mainly discuss smaller discs. We did not run a lab test. The top pick is the highest-scoring product. Best value balances the captured price with a usable stated specification. It does not mean the cheapest blade suits every material or saw.
Product and material specification
35%Diameter, bore, segment height, thickness, rim and the materials the listing actually names, including whether wet or dry use and EN 13236 are stated.
Machine-fit clarity
20%Whether the bore and diameter match a 350 mm saw, and whether a reduction ring or a conflicting size line is left unstated.
Review evidence
20%amazon.co.uk stars and review counts only where the captured comments describe this size. Mixed 115 mm or 230 mm reviews score less.
Value at the captured price
15%The amazon.co.uk shelf price set against a usable stated specification. The lowest price is not treated as suitable for every job.
Listing consistency and safety information
10%Conflicting size fields, a missing review line, and missing wet or dry, kerf or standard wording reduce the score.
Start with the saw, then the bore, then the material the listing names. A star rating does not tell you those three. These five rows are amazon.co.uk listings, with the prices and review counts stored for this comparison. A 350 mm wheel will not mount on a saw built for 300 mm, and a 25.4 mm bore is not a 20 mm bore unless an approved bush is actually supplied. None of these listings states one. Life in metres is not published. If the blade wobbles, is cracked or has lost a segment, stop.
A 350 mm diamond blade is a steel disc with a diamond rim for petrol cut-off saws and some masonry saws. In the UK it is used on concrete, kerbs, paving, blocks and brick. It is not a 300 mm blade and not a 115–230 mm grinder disc. Segmented rims clear dust. The GVHAKG lists 24 segments. Turbo or laser segments, on both PRODIAMANT bores, the OX Contractor and the OX Pro V10, are sold as a faster, cleaner cut. A concrete bond and an asphalt bond are different products at the same diameter.
Stihl UK specifies 300 mm for the TS 410. A UK parts guide treats the TS 420 as the 350 mm saw with a 20 mm bore, and the guard does not transfer. A 115 mm grinder is the wrong machine. Match the saw before you match the brand.
The 25.4 mm PRODIAMANT does not list a reduction ring, so it is not a direct fit on a 20 mm shaft. One UK review of the 20 mm PRODIAMANT said a Stihl saw needed a washer that was not in the box. Check the flanges. Do not make a bush.
The OX Pro V10 shows 4.8 from 28 ratings and the GVHAKG shows 4.7 from 46, but most of those texts describe 115 mm or 230 mm discs. The PRODIAMANT 4.3 from 1,078 ratings is shared by both bores. The OX Contractor has no review line. Stars are not a life figure, and no metre average is published.
The saw must be built for a 350 mm wheel. Stihl UK specifies 300 mm, which is 12 inch, for the TS 410. A UK parts guide treats the TS 420 as the 350 mm saw with a 20 mm bore, and the guard does not transfer between those models. Anyone who only has a TS 410, or only a 115 mm grinder, should not buy these discs. Bore is the next check. The PRODIAMANT 833800-350-20, the OX Contractor CG15-350/20, the OX Pro V10 (V10-350/20) and the GVHAKG state 20 mm.
Asphalt can undercut a hard-concrete bond, so the material line is a buying criterion, not a slogan. The GVHAKG names concrete and asphalt. Both PRODIAMANT bores name concrete, reinforced concrete, granite, kerbs, brick and masonry, wet or dry, and they do not name asphalt. The OX Contractor names bricks, slabs, roof tiles and concrete paviours. The OX Pro V10 names reinforced concrete, metal, brick, granite and Indian stone, and does not state wet or dry.
Three typical situations, each with a recommendation from this comparison.
You have a 350 mm petrol saw with a 20 mm arbor and the job is concrete, reinforced concrete, kerbs or masonry. The PRODIAMANT 20 mm bore names those materials, wet or dry, and states EN 13236. Check the flanges. One UK review needed a washer that was not in the box. Asphalt is not named.
The cut includes asphalt, so a hard-concrete bond can undercut. The GVHAKG is the only listing here that names asphalt, with concrete, brick, block and stone, a 20 mm bore and wet or dry use. Reinforced concrete and EN 13236 are not stated, and many reviews describe smaller discs.
You want the lowest captured price for bricks, slabs, roof tiles and concrete paviours on a 20 mm saw. The OX Contractor CG15-350/20 is about £30.92 and states EN 13236. There is no review line, wet or dry use is not stated, and asphalt is not named.
The top pick is the PRODIAMANT 350 mm with a 20 mm bore, at about £54.78, for concrete, reinforced concrete, kerbs and masonry when the saw takes a 350 mm wheel and a 20 mm arbor. The 4.3 from 1,078 ratings is shared with the 25.4 mm variant, and one UK review needed a washer that was not supplied. The best value is the OX Contractor CG15-350/20 at about £30.92 for bricks, slabs, roof tiles and concrete paviours, with EN 13236 stated and no review line in the captured data. Choose the GVHAKG at about £50.82 when the listing must name asphalt. A TS 410, a 115 mm grinder and a homemade bush sit outside this set.
OX Contractor CG15 350 mm
Lowest captured price, about £30.92, with a 20 mm bore, a 15 mm turbo segment and EN 13236 for the bricks, slabs, roof tiles and concrete paviours the listing names.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources for silica, training, marking and saw size. amazon.co.uk listings for B0171VPD7A, B0171VPDSO, B0D8BQZKZQ, B0H4ZJ3T28 and B0FHQF6ZJJ were checked in October 2026. Prices move.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts come from those listings. We did not run a lab test. The scores rank a listing inside this set only.
