The next generation of damaged fastener removal sockets! The twist socket sets easily remove damaged and odd sized nuts, bolts, pipe nipples and studs. Simply place the twist socket on the fastener and turn Works as easily as a regular socket Much faster and safer to use then torches, chisels or pounding on smaller size sockets.SAE sizes: 7/16", 5/8" and 3/4"Metric sizes: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm and 19mm