1、Aluminum Alloy: Crank cover screws are made of 7075 aluminum alloy, which is lightweight yet strong, rustproof, wear resistant and corrosion resistant, and durable. 2、Perfect Fit: No burr on the appearance, standard thread, perfect fit, prevent water, dust and other elements from entering. 3、High Accuracy: The tooth pattern standard will not cause different thread thicknesses, and the accuracy and strength are much better than the original plastic screws. 4、Lightweight Design: The crank screw has been designed many times, taking into account both strength and light weight, making riding easier. 5、Scope of Application: M19 tooth pattern screws are suitable for various brands of hollow one piece cranksets, which are excellent accessories for bike enthusiasts. Item Type: M19 Crank Cover Screws Material: Aluminum Alloy 3 x M19 Crank Cover Screws