This high quality star nut driver for inserting the starfangled nut found on 22.2, 25.4, 28.6 mm threadless headset systemUpgraded design for easier operation and long handle prevents your hands from hurtJust slide the outer sleeve over the steerer tube, drop the star nut in, align it with the steerer tube with the alignment pin part and then give it a tap with a rubber hammer and you/re done.It is a great portable tool for bike repair tool, home bike mechanic and outdoor cyclingPrecision control makes the star nut inserted stably without worrying overwhelming operationOuter Diameter:35mm/1.4 inchLength:108mm/ 4.25 inchWorks for 22.2mm (7/8 inch), 25.4mm(1 inch ), 28.6mm (11/8 inch) threadless headset systemBicycle Fork InstallerBicycle Fork Headset InstallerBicycle ToolBicycle Fork installing Toolcolour:SilverMaterial:Steel + aluminum alloyPackage Contents:1 * Bike Install ToolOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.