Feature:1. The spacing adjustment knob can adjust the distance between the brake handle and the handlebar, and adjust it to a suitable position according to the size of the individual's palm.2. Fine‑tune the brake knob to adjust the braking force, and adjust it to an appropriate level to facilitate operation.3. Double‑screw fixing handlebar aperture adopts double‑screw fixing design to be stable, not falling off and not loosening.4. The universal mounting aperture is suitable for most handlebars on the market, and the applicability is good. The universal handlebar aperture is 22.2MM.5. It comes with a wrench, which is very convenient for you to install the handbrake on the bicycle.Specification:Condition:100% Brand New Item Type: Bicycle Hand BrakeQuantity: 1 pairMaterial: Aluminum AlloyAperture: General model aperture 22.2MMFeatures:Fine-tuning the brakes, adjusting screws, metal springs, extended handles, fixing screws, handlebar aperturesSize:Length: Approx. 102mm / 4inWidth: Approx. 91mm / 3.6inPackage List:1 x Pair ofBicycle Hand Brake 1 x Wrench Notice:Please allow about 1‑2mm error due to manual measurement. Thanks for your understanding.