Feature:1. [High Hardness] High strength aluminum alloy material, fine workmanship, high hardness, and not easy to deform. Rugged and durable, easy to use and operate.2. [Anodic Oxidation] The appearance is treated with anodic oxidation, with bright color and corrosion resistance.3. [Fine Craftsmanship] The second glossy treatment and fine craftsmanship make its personality shine. Crank set and crank used to fix the sprocket, essential accessories for bicycles.4. [Crank Nut] The crank nut is exactness machined to perfectly fit the crank and provide professional fixation.5. [Use] The plate nail fixing wrench is used to fix the plate nail from one side, and cooperate with the hex wrench to remove the plate nail from the other side.Specification:Item Type: Single Chainring BoltsMaterial: Aluminum AlloyWrench for Screw Caliber: 9MM, 10MM.Package List:5 x Single Chainring Bolts1 x Wrench