This is an Authentic Manufacturer Sourced replacement part designed for Hitachi Power Tools. This item is made out of Carbon and Metal. This item includes Two (2) Carbon Brushes with Two (2) Lead Wires and Two (2) Springs attached. Please note Brush Holders are Sold Separately. Carbon motor brushes are one of the most commonly replaced p...Read moreower tool components. Because carbon brushes are wear items, meaning that through friction and use they will gradually wear away, they will eventually require replacement. You would need a Screwdriver and Pliers to complete this job.