Welding magnet buying guide for UK workshops
Updated: 18 October 2026
You are lining up a small mild-steel frame on the bench, but the packet offers 10 lb, 25 lb or 50 lb without explaining what any of those figures will hold. This welding magnet buying guide puts the decisions in order: first the metal, then realistic pull, the angles you need, and finally convenience and price. A welding magnet is an extra hand for positioning and tacking. It is not a lifting device. Our [welding magnet comparison](/hub/soldering-and-welding/welding-magnet) shows the ten amazon.co.uk listings once you know which specification fits. Prices are GBP shelf figures. A qualifying purchase through our links can earn a commission at no extra cost to you.
You are lining up a small mild-steel frame on the bench, but the packet offers 10 lb, 25 lb or 50 lb without explaining what any of those figures will hold.
You are lining up a small mild-steel frame on the bench, but the packet offers 10 lb, 25 lb or 50 lb without explaining what any of those figures will hold. This welding magnet buying guide puts the decisions in order: first the metal, then realistic pull, the angles you need, and finally convenience and price. A welding magnet is an extra hand for positioning and tacking. It is not a lifting device. Our welding magnet comparison shows the ten amazon.co.uk listings once you know which specification fits. Prices are GBP shelf figures. A qualifying purchase through our links can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Stated pull | Angles | Holders | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  AB Tools AB Tools AT847_4PK | 25 lb (about 11.3 kg) | 45°, 90°, 135° | 4 fixed arrows | 9.1 | about £11.03 | View offer |
| Best value |  S&R S&R 290.803.000 | 9 kg and 13 kg | 15° to 165°, seven faces | 2 multi-angle holders | 8.7 | about £11.95 | View offer |
| Alternative |  S&R S&R 290.103.100 | 12 kg side force | 45°, 90°, 135° | 1, with an on/off lever | 7.2 | about £28.98 | View offer |
On this page
What the holding-force number assumes
A packet figure such as 25 lb describes pull under favourable contact, not the weight of a frame you can hang from the magnet. Published data for comparable industrial clamps rates pull on clean, flat, relatively thick mild steel. Thin sheet, mill scale, paint, rust, weld spatter and a small air gap all reduce the force you feel. A long tube also creates leverage that a simple pull number does not represent.
Ordinary mild steel and iron are suitable. Aluminium, brass and copper are not. Common austenitic stainless grades such as 304 and 316 are effectively non-magnetic for this purpose. A 25 lb arrow should offer more margin than a 10 lb mini arrow when both sit flat on the same clean plate. It does not follow that either will hold a metre-long section upright. Support the work on the bench, and use a clamp when gravity or leverage is carrying the load.
Choosing between 10 lb, 25 lb and 50 lb
The 10 lb Neilsen mini set costs £7.89. One owner report says roughly 500 mm of 3 mm steel was already too much. That makes the set reasonable for tabs, tinplate and short edges, and a poor default for box section merely because its 1,779-review total looks reassuring.
Around 25 lb is the more balanced starting point for supported home fabrication. The AB Tools four-pack is listed at £11.03 and the YESWELDER 25 lb pack at £14.24. Owner evidence for AB Tools says a metre of 50 x 50 x 3 mm box section could overwhelm the hold. If the workpiece can fall or twist when released, add mechanical support before you strike an arc.
The YESWELDER 50 lb pack is listed at £11.98, but its review text, star line and sales rank are identical to the 25 lb page. The catalogue says 50 lb. The shared reviews do not independently prove that model's performance. Swpeet's title says 25 lb while one bullet mentions 25, 50 and 75 lb, and Spurtar shows 13 kg in the title but 25 lb in the catalogue. Do not average conflicting figures. For long, upright or load-bearing work, a clamp may be the right tool. See welding magnets for sheet and pipe.
Angles, quantity and switchable designs
Most arrow magnets provide 45°, 90° and 135°. Four matching arrows let you hold several corners of a small frame before you check the diagonals. Six pieces are worthwhile only if you regularly assemble several joints at once. Piece count does not compensate for weak contact.
If you need 30° or 60°, choose a holder that physically provides those faces. The QWORK six-piece set spans 30° through 135°. The two-piece S&R set adds 15°, 60°, 120° and 165°. Its £11.95 price is useful for unusual angles, although two holders cover fewer simultaneous corners than a four-pack.
A fixed arrow is always magnetic, so it pulls sideways while you position it and gathers filings in storage. The only switchable model here is the S&R at £28.98, with a stated 12 kg side force. The lever improves handling. It does not automatically make the holder stronger. Read switchable or fixed welding magnet if repeated setup and cleaning are the frustration.
A sensible order for spending your budget
Check the workpiece with an ordinary magnet before you compare brands. Next choose enough stated pull for supported mild steel, then the angles and the number of simultaneous joints. Decide on a switch only after those essentials are settled. Price comes last, because saving £4 on a holder that cannot sit flat is not value.
Entry listings run from about £7.89 to £12.99. Fixed sets with more pieces reach £16.19. The sole switchable listing costs £28.98. Those are amazon.co.uk shelf prices recorded on 16 October 2026. Trade shops may show ex-VAT and inc-VAT figures together, so compare like with like. Clean the faces, tack the joint and remove the magnet before you complete the bead. Welding fume control still applies. A magnet holds metal. It does not make welding safer.
Common questions
What does 25 lb of holding force actually mean?
It is a seller's pull figure under favourable contact conditions, usually clean flat mild steel with substantial thickness. It is not a safe working load for a suspended 25 lb object. Thin sheet, paint, rust, gaps and leverage from a long workpiece can reduce the practical hold sharply.
Is a 10 lb four-pack enough for 3 mm steel?
It may position very small, supported pieces, but thickness alone does not answer the question. A Neilsen owner reported that about 500 mm of 3 mm steel was too much. For longer plate or box section, use a 25 lb-class holder with bench support and add clamps where failure could cause movement.
When do I need more than 45°, 90° and 135°?
Choose a multi-angle set when your drawings actually include 30°, 60° or another non-standard joint. QWORK and S&R sets in this comparison provide extra faces. For ordinary rectangular frames, four matching 45°/90°/135° arrows are usually more useful than two specialist holders.
Do I need an on/off switch for my first set?
Not necessarily. Fixed arrows are the rational low-cost choice for occasional tacks on a clean bench. A switch earns its premium when you reposition the holder repeatedly, struggle to prise it from flat steel or spend too much time removing swarf. It does not guarantee more holding force.
Will a welding magnet stick to stainless steel or aluminium?
It will not hold aluminium, and common austenitic stainless grades such as 304 and 316 are not suitable either. Some other stainless grades can be magnetic, so test the actual stock rather than relying on the word stainless. The comparison is primarily for mild-steel fabrication.
Is a magnetic ground clamp the same product?
No. A welding magnet positions two ferrous workpieces at an angle. A magnetic ground clamp provides an electrical return connection for the welding circuit. One cannot safely substitute for the other, even though both attach magnetically to steel.
Related pages
Sources
Public UK sources and the amazon.co.uk listings in this set, last checked on 16 October 2026.
- HSE, Protect your workers from welding fume (retrieved 16 October 2026)
- HSE, Change in enforcement expectations for mild steel welding fume (retrieved 16 October 2026)
- HSE, Guidance on the safe use of magnetic lifting devices (retrieved 16 October 2026)
- Consumer Rights Act 2015, section 9 (retrieved 16 October 2026)
- Eclipse, heavy-duty welding clamp data (retrieved 16 October 2026)
- Euromag, ferrite magnets (retrieved 16 October 2026)
- Tec Products, welding magnets (retrieved 16 October 2026)
- Goudsmit, feasible forces for magnetic grippers (retrieved 16 October 2026)