Scope of applicationThe bicycle star nut installer is used to install the star nut found on 1-1/8in threadless headset systems . Exquisite designImproved design, easier operation, long handle can avoid hand injury, do not use rust, high precision, special screws are vulnerable parts, use of alternative solutions can significantly increase the life of the tool. Easy to useUsing a durable steel screwdriver and an integrated guide, it can align the tool perfectly. star nut and set it to the correct depth each time, then hit it with a rubber hammer and youre done. Bike Repair ToolsThis is a great tool portable for bicycle repair tools, home bicycle repairers and outdoor riding, this high quality star nut screwdriver for inserting 28.6mm star nut on threadless system. Strong MaterialsThese bicycle star nut adjusting tools are made of high quality steel and alloy. aluminum, which are of high hardness, durable and not easy to break, rust-proof and practical for long-term use. Product Specification: Color: Sliver Material: Aluminum Alloy Steel Size: suitable for 28.6mm headset star nut1-1/8 Application: steel/alloy front fork aluminum / titanium alloy with 28.6mm outer diameter at the top end (not all carbon front forks can be used) Features: simple operation , automatic left and right positioning and depth of flower core Instructions for operation steps: 1. After the front fork is cut off, the edge of the vertical tube is forcibly pressed, and the edge is turned over; before entering the sun flower, use a file to polish the edge to prevent the sleeve from getting stuck; 2. Screw the steel sunflower and screw it all the way; 3. Put on the sleeve and prepare to enter; 4. Hit the ejector rod with a rubber hammer until it is flush with the sleeve; 5. Take out the sleeve and the ejector rod, and the training is completed. Package including: 1 set bike star nut installation tool Free spare special screw and 1 free starter nut