As cows exit after milking, their destination can be determined by the use of drafting gates. Smooth cow flow through the gates is ensured by good gate design, where the angle the cow has to turn is minimised. Individual or numerous cows can be drafted from the main herd to holding pens for further attention. The gates are designed to stop cows forcing the gate and potentially getting jammed. Several manually (from the pit) operated gate designs are available using mechanical levers or pneumatics, or alternatively, a fully automated drafting system can also be installed.