Sophisticated design: improved design, simpler operation, long handle can avoid hand injuries, no rust, high precision, special screws are vulnerable parts, the use of alternative solutions can greatly increase the service life of the tool. Easy to use: using a durable steel screwdriver and an integrated guide rail, it can perfectly align the star nut and adjust it to the good depth every time, then hit it with a rubber hammer to complete it. Bicycle Repair Tool: It is a great portable tool for bicycle repair tools, bike repairers home and outdoor driving. This high quality star nut screwdriver can insert 28.6mm star nut on threadless system. High quality materials: stainless steel and matte surface, better materials and designs provide a better experience than the others. Specification: Color: silver. Material: aluminum alloy steel. Size: Suitable for 28.6mm (1-1/8"") headset star nut. Application: The outer diameter of the upper end of the steel/aluminum/titanium alloy front fork is