Replacement insert pads to fit cartridge style V-brake carriers. Compatible with the Aztec V-type System Shimano mountain bike cartridge systems and many other third party models. Removes the need to re-set the brake pad position just slide out the worn pad and slide in the new one. High performance Aztec compound and design for long life all weather braking power Compound designed specifically for use with alloy rims Secured in place by two small split-pin which are included Supplied as a pack of two pairs