Y- Hexagon socket wrench with three hexagon socket holders 4/5/6 mm. This star-shaped Allen wrench has an ergonomically shaped and non-slip handle due to its rubberized cover. With the Allen wrench you can tighten or loosen 4/5/6 mm Allen screws, e.g. stem, seat post, brake cable fixing, etc. Due to its small, compact shape, the Y hexagon socket wrench is also ideal for use on the road.