Stainless Steel Chain roller chain or bush roller chain is the type of chain drive most commonly used for 
transmission of mechanical power on many kinds of domestic, commercial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held jointly by aspect links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient[1] method of power transmission.
Though Hans Renold is credited with inventing the roller chain in 1880, sketches by Leonardo da Vinci in the 16th century show a chain with a roller bearing.