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Screw extractor buying guide: pick the tool family

Updated: 22 October 2026

You are standing in a UK garage or hallway with a screw a normal driver will no longer turn. The head may still stick out, the hex may be rounded, or the head may have snapped flush. This screw extractor buying guide is the fork before you compare shelf prices: which family matches that failure, and how to read the size on an amazon.co.uk listing. The rows, stars and prices sit on the [screw extractor comparison](/hub/screws-and-accessories/screw-extractor). Peter F. wrote this from those listings, updated 22 October 2026. This is not a lab test. Steel names are seller claims. A purchase through our links may earn a commission at no extra cost to you.

You are standing in a UK garage or hallway with a screw a normal driver will no longer turn. The head may still stick out, the hex may be rounded, or the head may have snapped flush.

Our top picks

Engineer Engineer PZ-58 pliers

Best overall

Engineer Engineer PZ-58 pliers
8.6/10about £16.99
View offer
Engineer Engineer DBZ-20 hex set

Rank 2

Engineer Engineer DBZ-20 hex set
9.0/10about £19.99
View offer
BGS BGS 1896 spiral set

Best value

BGS BGS 1896 spiral set
8.4/10about £5.60
View offer
On this page
  1. 1.What went wrong with the screw
  2. 2.Five tool families in this comparison
  3. 3.Reading size labels on UK listings
  4. 4.Steel claims, and when to stop
  5. 5.Which family to open

What went wrong with the screw

Name the damage before you name a brand. A door, gate or TV-mount screw often still has a head above the surface, even if the Phillips, Pozidriv or Torx drive is ruined. That is a proud-head job. A small Allen bolt can look intact until the internal hex is round and the key spins. That is a hex-socket job, and it is a different tool from a spiral. A stud broken level with the casting has no head to grip, so pliers will not reach it. A rusted deck screw that still stands proud is not a sheared wheel stud. Force the wrong family and UK reviews repeat the same endings: the bit spins, the jaws mark the head, or the extractor snaps.

Five tool families in this comparison

These listings are five tools, not one kit. The Engineer PZ-58 pliers grip a proud head of about 3 mm to 9.5 mm and include no drill. The Engineer DBZ-20 bites a rounded hex of 2 mm to 5 mm and says you do not have to drill the fastener out. Double-ended sets drill a seat, then grip a ruined head that is still on the surface. BGS 1896 and S&R are spirals for a hole you have already drilled: BGS prints 3–6 mm up to 19–25 mm, and S&R prints M3 to M18. Bryze pairs left-hand drills from 1/8 in to 19/64 in with extractors #1 to #5. Who each listing suits is on the best screw extractor page.
Engineer Engineer PZ-58 pliers

Testsieger

Engineer Engineer PZ-58 pliers
8.6/10about £16.99
View offer

Reading size labels on UK listings

Double-ended sets mostly print #0 to #4. Spiral sets print millimetre bands. This comparison does not convert one into the other. The BGS 1896 bands run from 3–6 mm to 19–25 mm. The S&R title says M3 to M18, while a head-size field says M6. A #2 extractor is not a 6 mm spiral. If the card does not print your size, do not guess. Starting on the largest bit is how a snapped extractor gets left in the hole. Shelf prices here run from about £4.29 to £19.99: roughly £4 to £9 at the entry end, £10 to £14 in the middle, and £17 to £20 for the two Engineer tools.

Steel claims, and when to stop

Treat HSS 4341, HSS 6542, a claimed 63–65 HRC, chrome-vanadium and carbon steel as lines the seller printed. Reviewers still report drills that will not cut stainless or a high-tensile bolt. Use the amazon.co.uk rating with its count. A high count shows both success and failure. Consumer Rights Act 2015, section 9, judges satisfactory quality against the description and the price. That is not a promise a rusted wheel stud will come out. In Great Britain the General Product Safety Regulations 2005 expect a product to be safe in foreseeable use, including a snapping extractor. At work, PUWER 1998 covers the drill, and eye protection is an employer duty where other controls fall short. The sequence is on how to use a screw extractor.

Which family to open

Open pliers for a proud head inside about 3 mm to 9.5 mm, hex bits for a rounded socket of 2 mm to 5 mm, a double-ended set for a ruined drive still on the surface, and a spiral or left-hand kit only when the head has gone and you can drill a centred pilot. Stop if the extractor has snapped in an engine, hub or suspension stud. A larger bit will not repair an oval hole.

Common questions

Do I need left-hand drill bits as well as extractors?
You need them when you want the drill itself to turn anti-clockwise and sometimes wind the bolt out before an extractor goes in. Bryze is the listing in this comparison that pairs those drills with extractors. A plain double-ended set is not that pair. If the left-hand drill does not free the bolt, you still stop if the tool snaps in a loaded stud.
Does a cheap set work on stainless?
Price does not tell you. Seller lines such as HSS 6542 are claims, and UK reviews on kits in this basket include bits that snap or fail to cut stainless and high-tensile bolts. A £5.60 spiral set can be the right family for a mild-steel stud and still be the wrong steel for a stainless fastener. Read the review themes for snap and soft drills before you rely on the hardness number.
What PPE do I need in the garage?
Wear eye protection. The Health and Safety Executive lists chips from power tools as an eye hazard. At work, PUWER 1998 and the PPE at Work Regulations 1992 put ejected parts and eye protection on the employer. At home the same chips leave the hole. Keep hands clear of the drill chuck and do not lean over a bit that is about to bind.
Can I use a double-ended set on a sheared wheel stud?
A double-ended set is built for a head that is still there. A sheared stud needs a centred pilot and then a spiral or a left-hand drill, and UK reviews on those kits include snaps on wheel nuts and flush studs. If the stud is in a hub or the hole is already off-centre, stop and use a garage.
What is the difference between #0–#4 and millimetre size bands?
#0 to #4 is the scale printed on most double-ended sets in this comparison. Millimetre bands, such as BGS 3–6 mm up to 19–25 mm, or S&R’s M3 to M18, belong to spiral stud extractors. This guide does not convert one scale into the other. If your listing does not print the size you measured, pick a different listing rather than guessing.

Related pages

Stripped screw extractor

Broken bolt extractor

Screw extractor

Best screw extractor: match the failure, not the stars

How to use a screw extractor: centre, then reverse

Sources

UK public sources and the maker page named in the digest for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures in the stored listings.

  1. GOV.UK, General Product Safety Regulations 2005: Great Britain (retrieved 22 October 2026)
  2. The General Product Safety Regulations 2005 (retrieved 22 October 2026)
  3. Consumer Rights Act 2015, section 9 (retrieved 22 October 2026)
  4. HSE, PUWER overview (retrieved 22 October 2026)
  5. HSE, eye protection (retrieved 22 October 2026)
  6. RS Components UK, screw extractors guide (retrieved 22 October 2026)
  7. ENGINEER PZ-58 specification (retrieved 22 October 2026)
  8. GOV.UK, spiral-flute stud removers tool sheet (retrieved 22 October 2026)