What it does and why you need it Securely clamps the steerer tube and headset without hammering or damaging the fork. Ideal when installing or replacing a compression plug on threadless forks, especially on sensitive materials like carbon fiber. Prevents slippage, reduces headset play, and delivers a longlasting connection between stem and fork for safer, more reliable steering. Key features Materials: precisionmachined alloy body with steel internal hardware for abrasion resistance and long service life. Fit range: adapts to fork tubes 22.2 mm to 28 mm, providing a tight, repeatable fit across common road, gravel, and mountain bike fork sizes. Installation: expansiontype design eliminates the need for hammering; the secure fixation mechanism allows simple, controlled tightening with standard tools. Compatibility: suitable for steel, aluminum, titanium, and carbon fiber fork steerer tubes. Works with a wide range of bicycle models and headset types. Reusable and nondamaging: designed not to scratch or deform the fork inner wall during setup or removal. Wide extension range supports robust, waterproof installation. Performance advantages Durable construction resists wear from repeated installation and torque, maintaining clamping reliability over time. Precise expansion provides consistent alignment and stable headset preload without overcompression. Compact and lightweight while providing strong mechanical retention. Practical use scenarios Road bike upgrade: a worn or missing compression plug on a carbon road fork to restore safe headset preload without risking tube damage. Workshop build or service: use for installing a stem and headset on aluminum or titanium forks where repeatable, damage clamping is required. Ontheroad or spare part: carry as a lightweight, reusable spare to quickly restore steering stability after a loose or damaged plug during rides. What to expect in use Easy, toolfriendly installation with no pounding or special presses. Reliable, vibrationresistant fixation that maintains headset adjustment. Compatible across common steerer sizes and materials while protecting the fork interior from scratches and deformation.