Querqriff screwdriver: The ideal grip shape allows transfer of very high tightening and loosening torques. The ergonomic shape of the grip fits well in the palm of your hand, with the fingers placed securely in the gently rounded recesses. The whole hand comes into contact with the grip, preventing friction loss between the hand and grip. With holding function to hold the socket head cap screw securely on the tool. Special surface treatment for effective corrosion protection and an optimal screw fit.