Includes 5 single speed chainring bolts Material - Chrome Steel Compatibility - All single chainrings, no triples Color - Black Condition - Brand New These bolts are great for creating a converted single speed. You can get rid of all of your other chainrings because they are the proper length for a single chainring. This auction is for a set of 5. They require a 5mm allen key and possibly a chainring bolt spanner for installation. If you would like any other information, please contact us.