Proto J1221MBASD 21mm 12-Point ProtoBlack™ Metric Combination Wrench

FEATURES:
•Black oxide finish. •Open End: Anti-slip design (ASD) –Locking groove to help prevent slippage. –Arched surface which spreads the force over a 400% larger contact area to help prolong life. –No ribs or serrations to damage fasteners. •Boxed End: TorquePlus™ –Allows up to 15% more torque to be applied to the fastener. –Reduces the risk of fastener rounding. –Provides a better grip on worn, rounded fasteners