Apex EX-380-B Drive Extension, Imperial, 5/16 x 3/8 in Male Hex To Male Squared Drive, 1-1/2 in OAL, Ball 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.