High performance steel alloy. Dynamic-Drive profile protects the sockets from wear and damage. Set contains: HEX4, HEX5, HEX6, HEX7, HEX8, HEX10, HEX12, HEX14 and HEX17mm. Bahco Hex Socket Set 9 Piece Steel Alloy. The Bahco S9HEX 1/2in Drive Socket Set contains a selection of sockets made from high-performance alloy steel with a matt finish. The Dynamic Drive™ profile protects the sockets from wear and damage. Supplied in an oil and temperature resistant polypropylene case.