Features: Make of aluminum alloy, it has excellent durability and strength, ensuring long-term use without easy damage. Suitable for single chainring bicycles, it can effectively fix the chainring and avoid loosening and falling off. Installation is simple and convenient, without adding extras load to the bicycles. The has undergone special treatments and has good resistance, which can resist damage from water, moisture, and other external environment. Suitable for mountain bikes, road bike, folding bike, fixed gear bike, track bike, Specifications Aluminum alloy Color: Yellow/Redness/Purpleness/Green/Black/Silver Size: 4.9mm (0.19inch)/6.4mm (0.25inch) Package Includes: 5pcs Chainring Bolts note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Make of aluminum alloy, it has excellent durability and strength, ensuring long-term use without easy damage. Suitable for single chainring bicycles, it can effectively fix the chainring and avoid loosening and falling off. Installation is simple and convenient, without adding extras load to the bicycles. The has undergone special treatments and has good resistance, which can resist damage from water, moisture, and other external environment. Suitable for mountain bikes, road bike, folding bike, fixed gear bike, track bike,