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 40% more torque than conventional handles Molded on insulation provides permanent bonding Nutdrivers are precision formed for heavy-duty work Tempered blades finished with black oxide and super hardened for maximum quality Lifetime guarantee