ITEM NAME:Pack of 10pcs Bike Chainwheel Screw Chainring Washer Gasket Bicycle Dual to img *{margin:0;padding:0;.It is used to mount single chain wheel because the double chain wheel screws is too long to lock by wrench. Suitable for bike headset, stem, and chain wheel changing. 10 Bike Washers. Made of qualified aluminum alloy; wear resistance, strong tensile strength.
