1. Material: aluminum alloy 2. Use: used to fix the crank and crank of the chain wheel 3. After cutting and anodizing, smooth appearance, a good decoration for your bike 4. Overall light and compact, high hardness, easy to install 5. It can spread the pressure and tighten the nuts on the parts, reducing the chance of damaging the parts 6. Made of aluminum alloy material, high strength, corrosion resistance, durable and sturdy 7. M18 thread screws are suitable for Prowheel hollow one-piece discs; FS.A discs and old FC-4500 and FC 5600 road discs, etc 8. M19 thread screws are suitable for ZTTO, IXF and other brands of hollow one-piece discs 9. M20 crank cover screws are suitable for Shimano sets such as: M4000, M590, M596, M661, SLX, XT, XTR and other one-piece discs
