This is a genuine part which is supplied directly by the original equipment manufacturer and is used with Porter Cable dry cut saws. The carbon brush conducts an electrical current to the armature and motor. Carbon brushes are a common wear item, and it is recommended to be replaced often. This part is sold individually, though two are ...Read morerequired and it is suggested to replace both brushes at the same time. For this repair you will need a screwdriver and a pair of needle nose pliers to aid you.