Comfort grip T-handle 3/8"Sq drive. Features 2-in-1 wobble and rigid bar. Simply push the socket further onto the bar to fasten in the rigid position. Includes 14mm Bi-hex, 16 and 21mm 6-point Chrome Vanadium spark plug sockets with rubber inserts. Comfort grip T-handle 3/8"Sq drive. Features 2-in-1 wobble and rigid bar. Simply push the socket further onto the bar to fasten in the rigid position. Includes 14mm Bi-hex, 16 and 21mm 6-point Chrome Vanadium spark plug sockets with rubber inserts. Lifetime guarantee*.