ITEM NAME:Expansion Screw Practical Fork Headset Cycling Bicycle Hanging Core Accessories Descriptions: Made of aluminum alloy and stainless steel material, durable, good performance, and long time to use. Easy and convenient to install, can be used repeatedly, expansion diameter range is about 22.2-25.4mm. 360 degree around the ratchet, bite tight, security firm. Use for 28.6mm straight aluminium fork, carbon fiber fork, steel fork, titanium alloy fork. An useful cycling accessory for cyclist. Specifications: Material: aluminum alloy+stainless steel Color: silver Top cap diameter: about 28.6mm Height: about 30mm Expansion diameter range: about 22.2-25.4 mm Package Included: 1pc x bike expansion screw Note: 1. Due to the light difference, the item's color may be slightly different from the pictures. 2. Please allow slight deviation for the measurement data and make sure you do not mind before ordering..Use for 28.6mm straight aluminium fork, carbon fiber fork, steel fork, titanium alloy fork. 1pc x bike expansion screw. 360 degree around the ratchet, bite tight, security firm. Anyway we will try our best to avoid this kind of thing.