Bike Handlebar Extender Product Specifications: ?Material: Aluminium alloy bracket + carbon fiber bar ?Length: 7.87" (20cm) ?Carbon fiber bar size: 22.2 * 200mm / 0.87 * 7.87in (D * L) ?Style: Double pole ?Apply: Diameter between 2.1-3.2cm ?Function: Extend the handlebar bracket Package: ?20CM Bar*1 ?Alloy Clamp*2 ?C/D Style Plastic Spacer*2 ?Allen Key Wrench*1 How to install ?Step 1:Loosen the screws on the side of the extension frame with the supplied Allen key ?Step 2:Put the handle into the clamp, adjust the angle and distance of the two clamps ?Step 3:Tighten the screws ?Step 4: Unscrew the screw on the other side of the clamps ?Step 5:Measure the diameter of your bicycle handlebar. If the handlebar diameter is 25.4mm, use a large non-slip leather; if the handle diameter is 31.8, use a small non-slip leather ?Step 6:Install the anti-skid leather and clip on the handlebar of the bicycle, adjust the angle and distance ?Step 7:Tighten the screws ?Step 8:Installation completed