Laser 7524 12 Piece Damaged Nut/Bolt Extractor Set Features and Benefits: Use with 12 point sockets and wrenches. Specially hardened steel components finished in black. Can be used on up to 65% rounded nuts. Due to material used the tools should be considered consumable, and is not under any return warranty or guarantee. Following the instructions will help significantly increase the service life of the kit. Contents Sizes: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm.