USAG 1/2" Drive Adapter/Coupler - 1/2" to 3/8" (246 1/2) - Chrome finish. Overall height = 37mm. Maximum torque = 202nm (approx 150 ft lbs). The adapter or the 3/8" drive socket will likely fail if you try to use these with a 1/2" drive breaker bar to remove stubborn wheel bolts. Please upsize to 1/2" drive for any torque applications over 100 ft lbs. The USAG version is slightly cheaper but more importantly (especially for any "socket reducers" from ANY manufacturers) it carries a US warranty.