For repairing stripped threads on "Tapered Seat" and gasketed spark plug ports in aluminum and cast iron heads. No drilling required. Includes tap, expanding tool & one each of 3 sizes of inserts...
Swivel design required for access to recessed spark plugs on certain applications. 14mm x 12-point double hex sock 15-20° max swivel range OAL: 8.7" (22cm) 3/8" Square Drive