New Rotor chain-ring bolts designed for Shimano Dura Ace R9100 cranksets to cover over the unsightly holes that are exposed when using Q-rings or NoQ chainrings on the R9100 series crankset. These bolts have outer covers that maintains the smooth line and flow of the R9100 cranksets. Made of aluminum and anodized black, these are the perfect way to keep your bicycle looking awesome when using Rotor chain-rings.