The Urrea 3/8 in drive deep sockets, are made of chrome vanadium steel with nickel - chrome plated. The mouth of the sockets has a Super Drive design that prolongs their life and does not damage the screws and nuts and bolts. Meets National and International standards: American and European.. Used for automotive and industrial maintenance and repair work for applications where a conventional socket is limited due to space constraints. There is an Urrea socket always available and ready for any challenge.