An assortment of metric carbon brushes and parts for Hitachi and Ryobi brand power tools from The Hillman Group. Carbon brushes conduct current between stationary wires and moving parts, most commonly in a rotating shaft. Variants included in full assortment range from 6.5mm to 16mm in diameter. Full assortments of #58665 contain sixteen (16) refills comprised of Hillman item numbers #400524 - #400533, #400535 - #400539, and #400541.