All sockets made from cold forged high alloy chromium vanadium steel for the greatest precision and durability up to 30 more torque obtained thanks to the newly developed power drive profile the minimum torques demanded by din 899 are far exceeded the rounded drive flanks protect the screw heads all sockets and accessory parts are double matt nickel plated and chrome plated this guarantees a level of rust protection unobtainable until now all sockets are knurled which means that screws o