Post spirit level buying guide
Updated: 22 October 2026
The amazon.co.uk results for a post level mix a folding two-pack, a 125 mm TIMCO, a triple-bubble with one review, and a magnet-only corner tool. A post spirit level buying guide has to sort the job before it sorts the brand. A magnet is useful only on bare ferrous metal. A strap or band is the fixing you can count on for wood, concrete, and coated steel. This page ranks those decisions. The [post spirit level comparison](/hub/measuring-and-marking-tools/post-spirit-level) ranks the four stored listings. Peter F. read the stored amazon.co.uk files and public UK pages on 22 October 2026. There was no lab test. A qualifying purchase can earn a commission at no extra cost to you.
The amazon.co.uk results for a post level mix a folding two-pack, a 125 mm TIMCO, a triple-bubble with one review, and a magnet-only corner tool.
The amazon.co.uk results for a post level mix a folding two-pack, a 125 mm TIMCO, a triple-bubble with one review, and a magnet-only corner tool. A post spirit level buying guide has to sort the job before it sorts the brand. A magnet is useful only on bare ferrous metal. A strap or band is the fixing you can count on for wood, concrete, and coated steel. This page ranks those decisions. The post spirit level comparison ranks the four stored listings. Peter F. read the stored amazon.co.uk files and public UK pages on 22 October 2026. There was no lab test. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Fixing | Vials | Accuracy on the listing | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  LSGZJZY LSGZJZY triple bubble | Magnet and rubber band | 3, including a diagonal vial | Not stated | 5.6 | about £5.99 | View offer |
| Alternative |  TIMCO TIMCO 125 mm post level | Elastic, magnetic style | Not stated | Not stated | 5.4 | about £7.52 | View offer |
 Bubble Levels Bubble Levels 2-pack | Magnet and elastic | 3 | ±0.5 mm, no per-metre figure | 8.2 | about £9.99 | View offer |
On this page
Strap, magnet, or both
A magnet sticks to bare iron or steel. It does not stick to timber, concrete, copper, aluminium, or most plastic coatings, and paint can be enough to make a weak magnet slide. In 37 stored UK reviews of the Bubble Levels two-pack, weak magnets repeat, including on a steel post or a Durapost, unless the elastic is used. Other buyers said the magnets held on metal railing posts, so the result is mixed, and it is still not a reason to leave the strap in the box. TIMCO’s Amazon bullets name timber, metal, and concrete and call the tool elasticated, with a magnetic style. LSGZJZY states a magnetic base and a rubber band. VOANZO states magnetic strips and does not name a strap. On timber or concrete, a listing with no band is the wrong fixing. A strap that reviewers call short, or a magnet missing from the parcel, is a Consumer Rights Act 2015 quality problem with the seller. Fitting the band is on the how to use a post level page.
Three vials and a fixed or folding body
Two faces of a post have to be plumb at once. A single vial on one face can look centred while the adjacent face leans. Listings that state three vials are telling you there are two plumb directions plus a level vial. Bubble Levels and LSGZJZY state three. LSGZJZY also names a diagonal vial. VOANZO mentions acrylic vials and does not give a count. The Amazon bullets for TIMCO 468165 do not give a count either, although trade pages for that code do. Buy from the page in front of you. A fixed 125 mm corner wraps a square post and stays simple. Folding is the shape to look at when the corner is not a clean 90° or when you are also touching pipe. Bubble Levels moves in 15° steps. VOANZO’s title says the angle is adjustable and does not print the step. Folding is not a claim of higher accuracy. A 125 mm tool also cannot show bow along a 1.8 m fence panel. That span is the split on the post level vs spirit level page.
What the accuracy line is allowed to mean
An accuracy figure needs a length, or it is only a loose phrase. ±0.5 mm on the Bubble Levels listing has no per metre and no degree. You cannot turn it into ±0.5 mm/m. Faithfull FAIPOST, outside this four, prints 1.75 mm per 1 m and equates that to 0.1°. TIMCO trade pages for 468165 print ±1 mm/m. The stored Amazon file for that ASIN does not. VOANZO says millimetre-precise and gives no tolerance. LSGZJZY prints no accuracy figure. A smaller-looking number without a length is not a tighter level. BS 958:1968 is a British Standard for precision metal spirit levels. It does not cover these plastic post tools, and a brand name on the moulding is not a statement that the standard applies. If the listing will not say millimetres per metre, or degrees, treat the accuracy line as incomplete and judge the tool on vials, fixing, and reviews.
How the four listings sit on those tests
Read the rows against a band you can use on wood, a stated vial count, and an accuracy line that names a length. Bubble Levels, at £9.99 for two, has the elastic, the magnet, three vials, and 15° steps. It fails the length test, because ±0.5 mm is bare, and it is the only row with 4.4 from 109 ratings. LSGZJZY at £5.99 has three vials and a rubber band, no accuracy line, and 5.0 from one review with no text. The low price is real. The star is not a sample. TIMCO at £7.52 names timber, metal, and concrete and is elasticated, which passes the fixing test for mixed posts. The Amazon page fails the vial-count test and the accuracy test, and the stored review count is one. VOANZO at £7.99 fails the strap test, and millimetre-precise fails the length test. Its stored size of 5 by 5 by 5 cm at 140 g is unconfirmed. A 5.0 from one review does not beat 4.4 from 109. Named picks, including when Draper or Faithfull outside the set is the stronger look, are on the best post spirit level page.
Common questions
Will a magnet stick to a wooden or concrete post?
No. A magnet needs bare ferrous metal. Timber and concrete give it nothing to hold, and a plastic coat or a thick paint film on steel can make a weak magnet slide as well. For those posts the elastic or rubber band is the fixing. Listings that name only magnets, such as the VOANZO row in this set, are a poor match for a timber or concrete fence.
Do I still need the elastic on a steel post?
Often yes. The Bubble Levels reviews include magnets that would not hold on a steel post or a Durapost unless the elastic was used, and other reviews where magnets held on metal railing posts. Fit the band so a slide does not become a lean. A magnet without a backup strap is a gamble on the coating, not a feature you can assume.
What does three vials actually let me see?
Two of them are for plumb, on adjacent faces, so the post is upright in both directions. The third is the level vial, for a rail or a member that should be horizontal rather than vertical. A listing that never states a vial count has not told you that you can do both. Check the bullets on the page you are buying, not a different shop’s sheet for a similar photo.
Is a 15° folding body more accurate than a fixed corner?
No. The 15° steps on the Bubble Levels pack describe how the body folds, not a tolerance. A fixed 125 mm corner is the simpler wrap for a square post. Folding helps when the corner is not 90° or when you move onto pipe. Accuracy still depends on a figure with a length, and on a vial that is actually full.
Is ±0.5 mm the same as ±0.5 mm per metre?
No. The Bubble Levels listing prints ±0.5 mm and does not say per metre. Faithfull, outside this set, prints 1.75 mm per 1 m, which it also calls 0.1°. Those are different claims. A bare millimetre is not a tighter grade than a per-metre line, and it is not something this page converts.
Does a British brand name mean a British Standard?
No. BS 958:1968 applies to precision metal spirit levels, not to these plastic post levels. TIMCO is a familiar UK trade name, and the Amazon file for 468165 still does not print the ±1 mm/m that trade pages use. Buy the words on the listing. A brand is not a standard, and a standard for metal levels is not a certificate for this tool.
When is a straight spirit level the better buy?
When the thing you must see is long: a rail, a panel, or a bow over about 1.8 m. A post level in this set is about 125 mm to 188 mm. It can hold a reading on the corner of the post. It cannot span the panel. If you already own a straight level, you may only need the corner tool for the post itself.
Related pages
Sources
Public UK sources from the research digest, then the amazon.co.uk listings compared on this page. Shelf prices in this four are the stored listing figures. Draper and Faithfull prices outside the set were captured on 21 October 2026. This is not a laboratory test.
- England, GPDO 2015, Class A (gates, fences, walls) (retrieved 21 October 2026)
- Consumer Rights Act 2015, section 9 (retrieved 21 October 2026)
- BS 958:1968, spirit levels for use in precision engineering (retrieved 21 October 2026)
- HSE HSG47, avoiding danger from underground services (retrieved 21 October 2026)
- LSBUD, line search before you dig (retrieved 21 October 2026)
- TIMCO post level 125 mm, model 468165, trade page (retrieved 21 October 2026)
- Draper 75042 on amazon.co.uk, outside this set (retrieved 21 October 2026)
- Faithfull FAIPOST on amazon.co.uk, outside this set (retrieved 21 October 2026)