Replacement insert pads to fit cartridge style V-brake carriers. Compatible with the Aztec V-type System Shimano mountain bike cartridge systems & many other third party models. Removes the need to re-set the brake pad position just slide out the worn pad & slide in the new one. High performance Aztec compound & design for long life all weather braking power Compound designed specifically for use with alloy rims Secured in place by two small split-pins which are included Proven Aztec groove system helps clear water & dirt from the pad surface