Specifications: Material: Carbon Steel Color: Blue+Black Adjustable Range: 10 - 40mm/ 0.4 - 1.57in Item Size: Approx. 20 * 1 * 0.9cm/ 7.87 * 0.4 * 0.35in Item Weight: Approx. 100g/ 3.5oz Package Size: 20 * 5 * 1cm/ 7.9 * 2 * 0.4in Package Weight: 100g/ 3.5oz Packing List: 1 * Grinder Wrench