Amon Aluminum Wheel Cross Wrench 17, 19, 21mm 3 sizes thin-wall + 21mm 1 size thin-wall standard shape ITEM. No.1492 I purchased this and stored it without ever using it. Although it is unused, there are some areas with slight rust. Brand: Amon Material: Chrome Vanadium Steel Item Weight: 1.3 kilograms Socket Sizes: 17mm/19mm/21mm Thin-wall 21mm Standard shape Size: Approximately 400 x 400mm Shaft Diameter: Approximately φ15.5 (outer diameter)