This is a genuine OEM sourced replacement part designed for use with Ridgid tile saws. This assembly includes one (1) carbon brush with a lead wire and a spring attached. Please note brush holder is sold separately. Carbon brushes are a commonly replaced part on power tools. Due to normal use and friction brushes will gradually wear down...Read more and will require replacement. It is advised to replace both brushes at the same type. You would need a screwdriver to complete this job. • Make sure the unit is unplugged • First remove brush caps • Take out old brushes and replace them with new ones • Secure brush caps