GEDORE vanadium steel 31CrV3, Manganese-phosphated, Sizes 7/16" - 1.1/8" with hanging hole, Jaw: ground precisely to exact nominal size for optimum contact areas, Jaw set at 15°, Secure grip thanks to profile shaft - very ergonomic and handy, Overloading indicated by deformation, Size 10 - 135 mm with anging hole, *not standardised