A 3/8” drive end allows the speed T-handle to be used with a ratchet like and extension, The speed T-handle set includes 1/4” and 3/8” speed T-handles and a posi-lock adapter that allows the use of any 1/4” hex bit, This set is a must-have for all those hard-to-reach areas, Includes 1/4” and 3/8” speed t-handles, Aluminum sleeve for fast turning, Locking end to hold socket securely in place, Pivoting end to reach odd angles, Includes adapter to use with any 1/4” hex bit, SKU: ISN11223