Acc. to DIN 3110, ISO 3318, ISO 1085, ISO 10102, Slim pattern, oval shaft, GEDORE vanadium steel 31CrV3, chrome-plated, Satin non-glare finish, Jaw: ground precisely to exact nominal size for optimum contact areas, Secure grip thanks to slim profile shaft, Overloading indicated by deformation, Top-grade industrial quality for the hardest of continuous use, Chrome-vanadium steel 31CrV3, chrome-plated