Description: Features: brand new and high quality A part of nut driver, can attached to a handle, used for tightening nuts and bolts. Can provide increased strength and avoid the rounding of rusted or damaged fasteners. An useful hand tool for daily use. Nickel chrome plating resists corrosion and simplifies cleaning, heat treated 45 steel for uniform hardness and strength. Specification: Material: 45 Steel Optional Socket Size: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27, 30, 32(mm) Size: Top Diameter x Bottom Diamter x Height(approx) 8 : 8x21x39mm(0.31x0.83x1.54in) 9 : 9x21x38mm(0.35x0.83x1.50in) 10 : 10x21x38mm(0.39x0.83x1.50in) 11 : 11x21x38mm(0.43x0.83x1.50in) 12 : 12x22x38mm(0.47x0.87x1.50in) 13 : 13x21.5x38mm(0.51x0.85x1.50in) 14 : 14x21x38mm(0.55x0.83x1.50in) 15 : 15x21.5x38mm(0.59x0.85x1.50in) 16 : 16x21x38mm(0.63x0.83x1.50in) 17 : 17x23x38mm(0.67x0.91x1.50in) 18 : 18x24x38mm(0.71x0.94x1.50in) 19 : 19x26x38mm(0.75x1.02x1.50in) 20 : 20x27x38mm(0.79x1.06x1.50in) 21 : 21x27x38mm(0.83x1.06x1.50in) 22 : 22x28x39mm(0.87x1.10x1.54in) 23 : 23x31x38mm(0.91x1.22x1.50in) 24 : 24x31x38mm(0.94x1.22x1.50in) 27 : 27x26x43mm(1.06x1.02x1.69in) 30 : 30x40x44mm(1.18x1.57x1.73in) 32 : 32x42x44mm(1.26x1.65x1.73in) Color: Silver Quantity: 1 pc Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Socket(other accessories demo in the picture is not included.)