Professional tool for commercial or occasional use Manufactured from chrome vanadium steel for strength and durability 18mm Stubby Ratchet spanner Metric spanner Forward and reverse action fasten and undo (simply by turning the spanner in a 180 degree motion) Total length of the spanner 136mm. Combination spanner set one side open ended and the other fixed. 72 teeth action so less chance of the item slipping which allows for greater force to be applied to the spanner.