Features: Crafted from Titaniums Alloys material, it have good mechanical property, toughly, and corrosions resistance. Equipped with snap hoop plier and a small Wrenches for easy installation and disassembly. Suitable for installing middle axles of bicycles square hole. Accurate and smooth tapping, chamfered entrance, easily installation. Suitable for installing the center axles of various bicycles, such as road bicycles, mountain bbicycles, foldings bicycles, etc. Widely used in bicycles maintenance, modification, upgrading and other scenario. Specifications: Material: Titaniums alloys Color: Titaniums/Gold/Colorful Clamps length: about 167mm/6.57inch Single screw size: about 22.5x17.4mm/0.88x0.68inch Washer size: about 21.8mm/0.86inch Note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. Package includes: 2pcs Screw 1pc Wrenches 1pc Plier