Individually tested and VDE certified to 1000 V AC (1500V DC). Meets ASTM F1505-01, EN, DIN, and IEC 60 900 test standards. Ergonomic cushioned grips reduce muscle fatigue and provide more torque than conventional handles. Molded on insulation provides permanent bonding. Tempered blades finished with black oxide and super hardened for maximum quality. Precision ground tips made of hardened chrome vanadium tool steel provide secure fit for less spin-out. Lifetime guarantee.