The wera kompakt vde screwdriver set comes with 17 interchangeable blades including slotted phillips pozidriv torx and plus minus mcb blades the screwdriver tip is made from powerbit grade steel for unbeatable strength the vde handles feature a blade auto lok system and the kraftform design handle uniquely fits the hands contours during use individually tested for dielectric strength under a 10000v load to guarantee safe working at 1000v drop tested at extreme temperatures to ensure insulation