3-piece set, 1/2", Impact, sockets with plastic sleeve and inserted plastic stop, 3-piece (17, 19 and 21 mm) For use with 1/2" (12.5 mm) pneumatic impact wrenches. High-alloy special steel for extreme wear resistance and maximum torque of 500 Nm. In sturdy steel box (powder-coated). Drive 1/2 " Application machine-operated Type Item Design Wheel nut socket Features plastic-coated Main colour black Length 85.0 mm Secondary colour yellow Wrench size 17 mm, 19 mm, 21 mm Assortment 3 pieces