Premium quality 7 piece screwdriver set the screwdrivers are designed with diamond spiked tips which prevent slipping while you work diamond particles bite into the screw and substantially reduce the resistance forces but do not damage the screws at all not only does the tip stop slipping but it also ensures low contact pressure when screwing with no loss of power each screwdriver is made in accordance to din 52625265 standards features soft handle ball shaped handle for high torque wor