Made from Chromium Molybdenum steel and designed with a protective metal colour coded ring that prevents the socket wall spreading, these impact wheel nut sockets are capable of taking a maximum torque of 500Nm. To prevent damage to the alloy wheels and nuts each socket has a protective sleeve and an insert. Sizes: 17, 19 and 21mm (all 87mm in length) 1/2" drive so will fit any 1/2" drive ratchets / bars / extensions etc. Max torque: 500Nm 6 Point Damage prevention sleeve and insert Strong CR-MO material hardened to HRC 42-47 Colour coded for easier selection