Utility knife blades buying guide

Updated: October 2026

You already own the knife. The pack in the basket is the part that goes wrong, because a trapezoid blade, an 18 mm snap-off strip, and a 25 mm strip do not share a slot.

You already own the knife. The pack in the basket is the part that goes wrong, because a trapezoid blade, an 18 mm snap-off strip, and a 25 mm strip do not share a slot. This utility knife blades buying guide puts the knife first, then the cut, then a count and a review file you can believe. The utility knife blades comparison is the table of nine amazon.co.uk packs in GBP. Peter F. used those listings on 16 October 2026, not a laboratory test. A qualifying purchase can earn us a commission at no extra cost to you.

Our top picks

Badge	Product	Blade type	Stated fit	Pack	Note	Price	Offer
Best overall	Stanley Stanley 1992, 2-11-921	Trapezoid, two-point	Standard Stanley knives	3, 2pk or 10	6.3	about £10.86	View offer
	Bosch Professional Bosch Professional 1600A01V3J	Trapezoid	Bosch trapezoid knives	50, count agrees	7.7	about £15.55	View offer
Preis-Tipp	OX OX Pro 25 mm, OX-P220710	Snap-off 25 mm	25 mm snap-off knives	10, 7 segments	5.5	about £8.57	View offer

Best overall

Stanley Stanley 1992, 2-11-921

6.3/10about £10.86

View offer

Rank 2

Bosch Professional Bosch Professional 1600A01V3J

7.7/10about £15.55

View offer

Preis-Tipp

OX OX Pro 25 mm, OX-P220710

5.5/10about £8.57

View offer

On this page

1.Match the knife before the brand
2.Match the material
3.What the prices in this set can and cannot tell you
4.Dispenser, age check, and carrying

Match the knife before the brand

The slot is a gap in the knife, not a brand name on the card. A standard retractable Stanley knife takes a short two-point trapezoid. An 18 mm snap-off knife, such as Stanley's InterLock 0-10-018, takes a scored 18 mm strip. A 25 mm blade will not lock in that body. "Fits all standard Stanley knives" means the trapezoid pattern, not every red knife in a drawer. OX OX-P220510 at £5.39 is titled as an 18 mm SK5 10-pack with 8 segments, and two bullets also say 25 mm. OX OX-P220710 at £8.57 keeps the title and the fit line on 25 mm, with 7 segments. If the blade wobbles after it seats, stop. The family choice is on snap-off or trapezoid utility blade.

Match the material

With the slot settled, the edge shape is the next trade-off. A straight trapezoid is the stiff spare for cardboard and general sheet. It is a poor carpet blade: one review of the Stanley listing said the edge went blunt quickly on carpet tiles. A hook pulls through carpet, felt, or a membrane, and it will cut a hand if you pull towards yourself. A concave blade is the finer curve used on vinyl and LVT, where a hook snags the face. Ceramic in this set is a 10-pack about 61 by 19 mm, sold for paper, card, tape, film, and thin plastic. It is brittle, and it is not a flooring blade. Floor profiles are on utility knife blades for carpet and vinyl.

Testsieger

Stanley Stanley 1992, 2-11-921

6.3/10about £10.86

View offer

What the prices in this set can and cannot tell you

Shelf prices in these amazon.co.uk files run from £5.39 to £17.21. The Stanley listing is £10.86, and the title, the model cell, and the included cell do not agree. Bosch is £15.55 for 50, and the count is consistent. Which pack is the top pick for one job is on best utility knife blades.

Dispenser, age check, and carrying

A dispenser earns its place when it holds spent blades. The OX bullets name a safety dispenser. Stanley reviewers describe a dispenser even though the bullets do not. The law is separate from the slot. GOV.UK states that selling most knives to anyone under 18 is illegal, and so is carrying most knives in public without a good reason. Section 139 of the Criminal Justice Act 1988 is the England and Wales offence. The folding-pocketknife exception stops at a 3-inch cutting edge and only if the blade folds immediately. A slider or wheel-lock utility knife is not that pocketknife. This is not legal advice.

Common questions

Which blade fits a standard retractable Stanley knife?

A two-point trapezoid of the 1992 pattern. Stanley's UK specification for that blade is 62 mm long and 0.63 mm thick, with two tips. In this comparison the Stanley listing is £10.86, and the pack count on the page is not consistent, so count the blades in the box. An 18 mm or 25 mm snap-off strip will not lock in that knife.

Can I put snap-off blades in that knife?

No. Snap-off blades need a snap-off body of the same width. Stanley's InterLock 0-10-018 is an 18 mm knife with eight segments. A 25 mm blade will not lock in it, and neither width replaces a trapezoid in a retractable Stanley knife. Check the width stamped on the knife before you order.

What is SK5, and is it stainless?

SK5 is the older name for JIS carbon tool steel SK85, about 0.80 to 0.90 percent carbon. It is not stainless. The OX, Belivy, and hook packs print SK5 and do not print a hardness, so you cannot read a Rockwell figure into the word. Bosch prints S2 CVM in the bullets and stainless in the cell, which is a clash, not a second grade you can choose.

Is a dispenser worth paying for?

It is worth it when the case stores used blades, which Bosch states at £15.55 for 50. A card of loose blades is cheaper until the spent edge goes into a sack. Westminster says Stanley-type blades should not go loose into rubbish. A small household dispenser is not a trade blade bank.

Why do two OX listings share one star rating?

OX-P220510 and OX-P220710 both show 4.6 from 114, and the texts match a knife listing as well. The reviews describe snap-off knives, including locks and bodies, not a separate test of each blade width. Use the title and the fit bullet for width, and do not treat 114 as a blade score.

What should I ignore when a listing contradicts itself?

Ignore a per-blade price when the count disagrees, which is the Stanley row at £10.86. Ignore a star line whose texts are another product, which is Milwaukee's 4.7 from 1,230. Ignore a second width printed on an otherwise clear title, which is the 25 mm wording on the £5.39 18 mm OX pack. Buy the line that the title, the model, and the fit sentence all repeat.

How to change a utility knife blade