The bahco 111msh12 is a set of 12 combination wrenches in metric sizes made from a high performance alloy steel in a patented u shape design their u shape shank provides better comfort with the open end angle being 15 with a slimmer head for better accessibility the 12 point dynamic drive profile provides longer life for screws and nuts and the ring end angle is 15 for knuckle clearance or better grip they have bigger and bi directional size marking for easy identification and have a chrome pl