Features 1、Applicable Types: The crank is used to control the sprocket, suitable for M590 M596 M661 SLX XT and other original integral hollow disc with the same specifications, . 2、Manufacturing Material: Made of high quality aluminum alloy material, light and strong, rust resistant, wear resistant and corrosion resistant, can be used for a long time. 3、CNC High Accuracy Machining: CNC high accuracy machining, no burrs on the surface, standard thread, very suitable for preventing water, dust and other elements. 4、Simple Operation: Attached size detail drawing, using 10mm / 0.4in inner hex wrench for installation. Simple to operate, easy to install and disassemble. 5、Easy to Use: M18 Bicycle crank cover screw, easy to use and fine workmanship. Without any difficult requirements even though you use it for the first time. Item Type: M18 Crank Cover Screws Weight: Approx.9g / 0.3oz Product Material: 6061 Aluminum Alloy Purpose: Mountain Bike Package List 1 x Crank Cover Screw