Pipe wrench and nut wrench combination, tooth hardness: approx. 61 HRC. Adjustment by pressing the button directly on the workpiece, even with just one hand. The pinch guard prevents injuries. Self-clamping on pipes and nuts, does not slip off the workpiece and saves effort. Through-joint, chrome vanadium electric steel, oil-hardened, pliers gray phosphated, head polished, anti-slip handle plastic-coated, DIN ISO 8976 (formerly DIN 5231 D) Pipe diameter 3 1/2 " Features polished, oil-hardened Fine adjustment 27-fold Cutting edge hardness 61 HRC Main color black Length 400.0 mm Secondary color red Application assembly / disassembly Type / kind of article Design water pump / pipe wrench