Sealey T Bar & Rubber Insert Spark Plug Socket Set 4pc 3/8"Sq AK6550Comfort 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. Specifications Detail Comfort grip T handle 3 8"Sq drive. Detail Features 2 in 1 wobble and rigid bar. Detail Simply push the socket