Description: High Quality: Made of high quality aluminum alloy material, durable and practical for lasting use. Application: Suitable for front forks with 28.6mm outer diameter at upper end. For Bicycle Repair: Fork steerer setter star fangled nut setting tool kit adopts upgraded design and easier operating. Not slipping when install, convenient and easy, which is an excellent portable tool for bicycle repair tools. Easy Installation: Easily install and simple to operate, aligning nut with the front fork, put on the sleeve and knock down the exposed part of the grip. Wide Application: Suitable for most bicycle front forks, such as aluminum alloy front forks, steel forks, titanium alloy front forks. Great for home mechanics and outdoor riding. Specification: Material: Alumunim Alloy Size Chart: 4.5cmx3.17cm/1.77inchx1.25inch Package Includes: 1 Set Bike Headset Driver Tool(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.