Torqueplus 12-Point Short Box Wrenches, 5/16" x 3/8", 4 1/4" L

Features: Torqueplus fastening system drives off fastener body, more easily removing damaged fasteners | Applies more torque to fastener | Reduces risk of fastener rounding | Anti-Slip Design (ASD) wrench has a locking groove prevents slippage and knuckle injury