The Bahco S240 1/2in Drive Socket Set contains sockets made from high performance alloy steel. The sockets are protected from wear and damage thanks to the Dynamic Drive™ profile. All the sockets come with a matt chrome finish on them and are supplied in an oil and temperature resistant polypropylene case. S240 Features: Matte finish High-performance alloy steel Less wear and damage to fastener thanks to Dynamic-Drive™ profile sockets Quick socket release button on ratchet Case: High density polythene (HDPE) Standards: ISO 1174 and DIN 3120