Wera Kraftform 160 VDE Insulated Screwdriver Slotted 4.0 x 100mmWera screwdrivers of this safety pattern far exceed the requirements of relevant standards regarding strength and torque stability. Safety guarantee , individual testing of the tool for dielectric breakdown strength at 10,000 Volts in a water bath and safe working up to 1000volts. The handle is of ergonomic design for faster more powerful and less tiring screwdriving action and has anti roll feature.Blade Length, 100mmTip, 4.0mm