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Ring spanner vs combination spanner

Updated: 24 October 2026

You have been told to buy combination spanners first, and the open question is whether a ring-only set still deserves drawer space beside them. A combination spanner puts an open jaw and a ring on one size. A double ring spanner puts two sizes on one bar and both ends are closed. The [ring spanner comparison](/hub/hand-tools/ring-spanner) ranks ring listings only. Peter F. wrote this on 22 October 2026 from Haynes in the UK and the listings we kept. We did not test a combination set, and we do not quote a combination price. A qualifying purchase can earn us a commission at no extra cost to you.

You have been told to buy combination spanners first, and the open question is whether a ring-only set still deserves drawer space beside them. A combination spanner puts an open jaw and a ring on one size.

Our top picks

US PRO US PRO 7-piece 35° swan neck

Best overall

US PRO US PRO 7-piece 35° swan neck
7.4/10about £14.20
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BGS BGS 12-piece offset ring set

Rank 2

BGS BGS 12-piece offset ring set
7.9/10about £30.46
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Silverline Silverline 6-piece deep offset set

Best value

Silverline Silverline 6-piece deep offset set
7.3/10about £5.95
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On this page
  1. 1.What each tool is
  2. 2.When the ring end is the one to use
  3. 3.When a ring-only set earns the space
  4. 4.What neither set should finish

What each tool is

A combination spanner is one size twice. The open jaw and the ring both fit, for example, 13 mm, so you can start a nut in a gap and finish it with the ring. Haynes Manuals in the United Kingdom calls combination spanners the most useful first buy for car maintenance. If you are buying singles, the sizes they name are 8, 10, 13, 15 and 17 mm. A double ring spanner is two sizes on one bar, such as 10×11 or 12×13, and both ends are closed. That is why a ring set covers more sizes per piece, and why it cannot start on a nut that a pipe blocks. Nothing below is a review of a combination ASIN. Pairs and standards are on the ring spanner buying guide.

When the ring end is the one to use

An open jaw bears on two flats. Haynes's rule is to use the ring rather than the open end when the ring will fit, because the open jaw slips and marks the fastener. On a combination spanner that means flipping the tool, as long as the ring can pass over the nut. Use the open end to crack a fastener you cannot drop a ring onto, then move to the ring for the rest of the turns. A 13 mm combination tool does not also give you 12 mm or 14 mm. A loose ring, including a 12-point ring on a nut that is one millimetre small, still slips. How to seat and pull a ring is on how to use a ring spanner.
US PRO US PRO 7-piece 35° swan neck

Testsieger

US PRO US PRO 7-piece 35° swan neck
7.4/10about £14.20
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When a ring-only set earns the space

Buy combination spanners first if you have neither. Add a ring-only set when the open end keeps slipping, or when the nut is recessed and the straight combination head will not sit. A 10×11 ring spanner does a job that two combination spanners would split. It will not replace the open jaw you need to start a nut beside a pipe. The bend that clears a recess is on offset ring spanner heads. If your combination set already has an offset ring end, you still only have one size per tool.

What neither set should finish

Neither set should finish a brake-pipe union or a fastener that has to meet a service torque. A pipe nut needs a slotted flare pattern, because a closed ring cannot pass along the pipe and an open jaw bites two flats on a soft union. A strut whose piston rod spins needs a tool that holds the rod. A ring can undo a hex nut. It does not measure newton metres, and it does not stop the rod turning. If you are choosing a first toolbox, start with combination spanners in the sizes Haynes names. Add a ring set when you can point at a recessed nut, or at a pair such as 10 and 11, that your combination tools do not put on one bar.

Common questions

Should my first set be combination or ring?
If you have neither, buy combination spanners first. Haynes treats them as the most useful first car tools because each one gives you an open jaw and a ring for one common size. A ring-only set is the add-on once an open jaw slips or a nut sits in a recess.
If I own combination spanners, what is left for a ring set?
What is left is reach and the neighbouring size. A double ring carries two sizes, such as 12×13, and an offset ring reaches a nut a straight combination head misses. Add it when you can name the nut the combination set will not do.
Why do ring sets use two sizes on one bar?
A double-ended ring is closed at both ends, so the maker puts a different size on each end. A combination spanner usually keeps one size, because the open jaw and the ring are a pair for the same nut. A 13 mm combination tool does not include 14 mm on the back.
Can the open end crack a tight nut?
It can start a nut the ring cannot drop onto, and it slips once the flats are loaded hard. Two points of contact mark a tight fastener more readily than a seated ring. Flip to the ring of the same size for the rest of the job. A harder shove is how the corners round.
Is a ring spanner the same as a wrench?
In the UK the tool is a spanner. Wrench is the usual American word. Searching amazon.co.uk for wrench will not line up cleanly with these ring listings. Check whether the result is a double ring or a combination tool, because both appear in a ring search.
Will a combination set reach a recessed nut?
Only if that combination spanner has an offset ring deep enough for the recess you can see. Many combination rings are only slightly cranked. A deep-offset ring set is the add-on when the combination head fouls the surrounding metal. A combination set is not automatically the recessed tool.
What about brake-pipe nuts?
Leave them to a slotted flare spanner. A closed ring cannot pass the pipe, and an open jaw bears on two flats of a union that rounds easily. If the union is seized, that is brake work, not a longer pull.

Related pages

Best ring spanner sets

Ring spanner

Ring spanner buying guide: pairs, offset and profile

How to use a ring spanner without rounding the nut

Offset ring spanner: 35 degrees, 75 degrees, or flat

Sources

Sources from the research digest, last checked on 22 October 2026.

  1. ISO 10104:2018 preview (retrieved 22.10.2026)
  2. HSE, PUWER overview (retrieved 22.10.2026)
  3. HSE, maintenance of work equipment (retrieved 22.10.2026)
  4. Consumer Rights Act 2015, section 9 (retrieved 22.10.2026)
  5. Haynes UK, car maintenance tools (retrieved 22.10.2026)
  6. BGS 1214 double ring spanner set (retrieved 22.10.2026)
  7. Wonkee Donkee, flare nut spanner (retrieved 22.10.2026)
  8. GOV.UK tool specification sheet (retrieved 22.10.2026)