Chrome Molybdenum Steel，Made of high hardness chrome molybdenum steel for durability

All the bolt extractors are precision engineered to easily extract damaged bolts, nuts and screws even if they are stripped, rusted or frozen

Tight grips and won’t let go, the internal thread design provides excellent torque, the more you turn, the tighter the socket grips

2- Hex Adapters: 3/8''F x1/4''M;  13- Sockets: 1/4", 5/16"(8mm), 3/8", 10mm, 7/16"(11mm), 12mm, 1/2", 13mm, 9/16"(14mm), 5/8"(16mm)

17mm, 11/16", 3/4”(19mm)

Heavy duty blow molded case lets all the bolt remover stay organized