The Wera Series 160 i/7 Insulated screwdriver sets are tested individually for dielectric strength under a load of 10,000 volts so as to ensure safe working with loads up to 1,000 volts. They have a premium Gold Lasertip, a tip which has a laser roughened surface which literally bites into the screwhead, reducing cam-out and eliminating the need for two-handed screwdriving.