Insulated Comfort Grip Two-Color Dual Component Handles are 1000 Volt VDE-Tested * Box-Joint Design is Highly Stable Because of a Double Guide * Self-Locking on Pipes and Nuts with no Slipping on the Work Piece and Low Hand Force Required * Guard Prevents Fingers Being Pinched * Gripping Surfaces with Special Hardened Teeth, Teeth Hardness Approximately 61 HRC Provides Low Wear and a Secure Grip