Once you've used these you won't go back. At one end a 'normal' open ended spanner, at the other a ratchet spanner in an open ended head! Makes the most tight access jobs easier and a boon for brake pipe nuts etc. Loosen with fixed head then ratchet away with the other.
These aren't a gimmick that will break after 5 minutes, they're beautifully made from Stainless Steel, which means they are approved for aviation use (Chrome spanners can flake, those flakes can enter electrical systems = problems!).
3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16".
A pleasure to use and to own.
US Patent 5582082