Thread repair kit includes all the tools and 5 inserts p/n 14158  It's possible to turn all the tools in this kit with 12 point sockets. 12 point sockets will hold a square. 1) Drill square = 1/2 inch 12 point socket. 2) CounterBore square = 7/16 inch 12 point socket. 3) Tap square = 7/16 inch 12 point socket . 4) Driver tool square = 3/8 inch 12 point socket.