10 Inch Tongue and Groove Pliers with Insulated Grip Features Tongue and groove design is patented and ensures a solid grip Drop-forged, high carbon steel construction, made to withstand the toughest of applications Reinforced flange protects against breakage The teeth are laser-hardened to remain sharp for long time Meets ASTM F1505-01, IEC 60 900 standards and OSHA requirements for insulated tools (29 CFR 1910) UL listed and 1000 Volt certified (1000V AC, 1500V DC)