SK wrenches are from Drop Forged Chrome Vanadium steel for maximum strength and durability. SuperKrome Plating delivers premium finish for providing long life and maximum corrosion resistance. SureGrip drive design drives the side of the fastener, not the corner, to provide increased fit and avoid rounding of rusted or damaged fasteners. 15 Degree offset ends make tight and restricting areas more accessible, and the thinner handle and rounded edges provide a comfortable grip. The 12 Point combination wrench set includes: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, with visible size and color markings – Black for SAE and Green for METRIC – for easy identification. Your job isn’t an easy one. It takes tough tools to get it done, but even the toughest tools can take a beating.