Ring 10° offset from shaft, extra strong rings but thin wall, Sizes 5 and 5.5 mm with hexagon ring, up from size 6 mm with UD profile, GEDORE vanadium steel 31CrV3, chrome-plated, * not standardised, Ring: 10° offset from shaft, with UD profile for gentle transmission of force, Overloading indicated by deformation, The offset ring ensures a better grip