Chain driven roller conveyor consists in a series of rollers, fitted with sprockets, supported by a structure driven by a chain connected to motor. The precise joint between the rollers and the driving element is essential to ensure an efficient and accurate rotation: the chain locks into the sprockets making a high-friction contact which transfers the power to rollers and turns on the system. Due to direct transmission from the chain to the rollers, no slippage and excellent traction, chain driven roller conveyor systems are suitable for multiple unit handling applications where pallets and other unit formats need to be transported. They are used for the controlled handling of a great variety of loads, with regular or irregular shapes, with heavy or light unit weights, rugged or fragile, either horizontally or with a light slope.