Specifically designed torsion sockets which torque up to 80ft lbs (108Nm) Only use with an impact wrench Prevents over tightening of wheel nuts (NB. Always use a torque wrench & normal socket to check the torque after) Sizes 17/19/21mm x 120mm 6 point x 1/2in. Drive Use with Laser Part Nos: 5586 or 5585 Manufactured from Chrome Molybdenum