An assortment of metric carbon brushes and parts for Bosch 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 #58664 contain sixteen (16) refills comprised of Hillman item numbers #394949 - #394955 and #394957 - #394965.