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

Apex® 1/4'' square Drive™ extensions, 7/8'' to 14'' (22mm to 356mm) length from Cooper Tool. 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.