Star Nut Wrench Installation Tool Easy to use - Place the star nut into the tool and tap it into the front fork steering gear with a rubber mallet. Do not use a steel hammer that can damage the front fork and frame. Protect your body - A portable bicycle maintenance tool with a long handle to reduce risk of hand injury during installation. Package contents - installation tool x 1 piece - replacement special screw x 1 piece - star nut x 1 piece Wide compatibility - Fits 7/8, 1-1/8, and 1 inch (22.2mm, 25.4mm, 28.6mm) steerer tubes without threads - Not suitable for carbon fiber front forks Use scenarios - Scenario 1: Install a star nut on a standard alloy or steel front fork with a non threaded steerer tube in sizes 7/8, 1-1/8, or 1 inch - Scenario 2: Replace a damaged star nut during routine maintenance using the included star nut and replacement screw - Scenario 3: In a home shop or bike shop, perform star nut installation safely with the long handle to keep hands away from the impact area