The Muc-Off Crank Protection Kit features Ultra-Tough Cube-Tec material that shields against scratches scuffs stone chips and other damage to your cranks.Ultra-Tough Cube-Tec material is comprised of a multiple tessellating 45-degree-angled cubes which due to their shape and pattern provide added strength and flexibilityWeatherproof 3M self adhesive is super easy to install and will stay firmly in place whatever the conditions and however you ride2-piece pack is designed to fit most cranksKits are made up of universally designed shapes and sizes to cover all the high-risk areas