PFERD double stem, double spiral power tube brushes for heavy-duty cleaning and deburring of IDs: threads, pipes, holes, keyways, etc. Heavy-duty construction offers long service life and most effective brushing action. Achieves optimal performance when fully chucked in drill presses and collet-equipped portable tools. Carbon steel bristles. Designed and manufactured with an interference fit. Loop end of tube brush handle can be cut off for use in power tool. Provides excellent abrasion and wear resistance, along with high flexing action. High strength filament able to remove heavy buildups. Good bend recovery. Uses in industries area: automotive, transportation, mining, electronics, aerospace, welding, nuclear, textiles, food services, construction, petrochemical, farming, medical, shipbuilding, fabricating, defense, foundries and plastics.