Professional Quality 250mm Plier Wrench is manufactured from special high-grade tool steel, oil hardened and tempered Smoothly ground heads and faces with cutting edges separately induction hardened Designed for working on nuts and unions especially components with finished surfaces, ie. plated or burnished The unique cam action jaws give a secure and powerful grip, which increases as more pressure is applied, Weight: 1.23 Pounds, Manufacturer: Knipex