for Torx® screws, VDE tested, safe working up to 1000 volts AC or 1500 volts DC, with blade diameter reduced towards the tip, for low-lying screws, quick-turning zone and slip protection for thumb and forefinger, secure hold when used in the hand, color code for each screw type , quick identification, special alloy based on spring steel, exceptional elasticity with high hardness, for handle PB 215 A, for your safety: VDE interchangeable blades may only be used with the PB Swiss Tools VDE interchangeable handles!