Every mechanic knows that having the right tools on hand can make your life easier when working on heavy-duty vehicle wheels. The STEELMAN 79390 1-Inch Drive x 21mm 4-Point Square Budd Impact Socket is designed specifically to help in the removal of the threaded, square end studs used in Budd style heavy-duty truck wheels. Made from drop forged and heat treated chromoly steel, this shallow socket features a ball detent recess on the 1-inch drive end to help hold it securely onto ratchets, air wrenches, adapters, and extensions. The socket features a rust and corrosion resistant black phosphate protective coating with laser etched size callouts and markings. Rated to withstand up to 150% of ASME torque requirements for impact tools, this socket can handle tough use in any professional shop / garage, home workshop, or on the work site.