After setting up the blades it is important to remember to set the tension on the clippers correctly. This is done by setting the tension screw that is situated on top of the clipper head. The finer the hair that you are clipping the more tension you want. To increase tension you turn the screw clockwise and for less tension, turn the screw anti-clockwise. You will very quickly find the right setting for the tension for clipping cattle. Before you start, and at regular intervals throughout clipping it is important to oil the head of the clippers, generally after every two or three animals. This helps to ensure the blades remain sharp and produce a clean finish. Clipping should ideally be carried out as cattle are being housed to keep stress levels to a minimum. Good handling facilities are essential to ensure cattle are properly secured. The idea is to remove as much hair from the back as possible. As lice tend to congregate on the top of the back, the removal of the hair helps to reduce the lice population.