The chain brush is a dedicated maintenance tool for motorcycles. One end features a unique “C” or “U” shaped head with stiff nylon bristles facing inward from three sides. This design allows you to clean the top, bottom, and side plates of the drive chain simultaneously by simply clamping it over the chain and rotating the wheel. The opposite end of the handle usually features a long, straight brush designed to reach deep in between the teeth of the sprockets to remove solidified grease.