BoxoUSA double open end wrenches are sold individually in nine metric sizes from 6-7mm to 22-24mm. Each has smooth jaw open ends, a mirror chrome finish and the size marked on both ends and sides. The collection also includes a 7-piece SAE ultra-thin double open end wrench set in 1/3 drawer EVA foam and a 13-piece metric ultra-thin double open end set in 1/6 drawer EVA foam.