First UL tested and classified insulated tools available 1000 Volt certified (1000V AC, 1500V DC) Meets ASTM F1505-01 and IEC 60 900 standards Meets OSHA requirements for insulated tools (29 CFR 1910) Patented undercut tongue and groove design ensures solid grip Patented reinforced flange protects against breakage Laser-hardened teeth remain sharp longer Drop-forged, high-carbon steel construction withstands toughest applications