Apex EX-371-6 Drive Extension, Imperial, 7/16 x 3/8 in Male Hex To Male Squared Drive, 6 in OAL, Pin Locking

Apex® male hex power Drive™ extension with 3/8'' male square from Cooper Tools. Apex® power Drive™ extensions have hex tolerances that are on average 48% tighter than DIN and 35% tighter than ANSI requirements. All Apex® power Drive™ extensions have the tightest tolerances for straightness and concentricity in the industry. With Apex® extension you are assured of an exact, sure fit.