This Lisle 8 Piece Tap Socket Set - 70500 is a great tool for threading and rethreading fasteners. It includes 8 pieces: 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, and 3/4 taps and sockets. The sockets have a 1/4 square drive and are made from high-quality alloy steel for strength and durability. The set also features a storage case for easy organization and transportation.