Baum - 1/2 inch Drive, 23 mm Impact Socket has a black phosphate covering, usually consisting of phosphates of iron, zinc or manganese. The black phosphate covering in the 1/2 inch Drive, 23 mm Impact Socket prevents galling, which is caused in surfaces that are in contact with other surfaces for a long time. The 23 mm Impact Socket is ideal for working on large joints as the socket size is the higher end. In addition, the chrome vanadium steel in the Impact Socket enables it to take heavy stresses.
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