Britool Hallmark Stud Extractor Set

Special twist sockets suitable for the removal of broken studs and bolts.
Each socket has a left-hand tapered spiral design, which tightens into pre-drilled stud/bolt as more torque is applied.
The set contain the following sizes:
3/8" drive/17mm Hex Drive; 2, 3, 4, 5, 6mm (36mm Length),
1/2" drive/22mm Hex; 8, 10, 12, 14mm (45mm Length).