Birzman Y-GRIP 4/5/6 MM Hex Wrench Birzman's Y-Grip Hex wrench features an ergonomically designed aluminum body that fits comfortably in your palm. The 3 hex heads are great for tuning in a wide variety of vital parts. Grab one for ease and comfort while dialing in your ride. Features Ergonomic design fits comfortably in the hand 3 heads 4, 5, and 6mm fits many vital components