Wiha (Heyco) Tools 35090. Open End Wrench set; Metric; 12 pc. Open End Wrenches Metric 12 Piece Set 4.0mm – 26.0mm Features. Sizes: 4 x 5, 5 x 5.5, 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, 16 x 17, 18 x 19, 21 x 23, 20 x 22, 24 x 26. Made from High Performance CRV forged Tool Steel. Satin Chromed Sure Grip Body. Narrow Profile for Easier Access In tight locations\. Precision formed for an exact fit.