ITEM NAME:5Pcs Headset Flanged Star Nut Star Washer & Fork Headset Star Nut Setting Tool Description: This high quality star nut driver and 5 pieces headset star fangled nuts for inserting the star-fangled nut found on 22.2, 25.4, 28.6 mm threadless headset system Upgraded design for easier operation and long handle prevents your hands from hurt Just slide the outer sleeve over the steerer tube, drop the star nut in, 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 cycling Precision control makes the star nut inserted stably without worrying overwhelming operation Specification: Material: Steel and Aluminium Alloy Outer Diameter: 35mm/1.4 inch Length: 108mm/ 4.25 inch Works for 22.2mm (7/8 inch), 25.4mm(1 inch ), 28.6mm (1-1/8 inch) threadless headset system Star Nuts: Material:Aluminium Alloy Color:Black Outer diameter: 2.5cm/1inch Screw hole diameter:0.5cm/0.2inch Package Includes: 1 Piece Bike Star Nut Install Tool 5 Pieces Bike Headset Star Nuts SKU: FUZ0001142819472522.This high quality star nut driver and 5 pieces headset star fangled nuts for inserting the star-fangled nut found on 22.2, 25.4, 28.6 mm threadless headset system. 5 Pieces Bike Headset Star Nuts. 1 Piece Bike Star Nut Install Tool.