For cutting ferrous metals (iron, steel, stainless). Has fast cutting action. Use with Spiral Buff or Ventilated Flap Buffs. Use with our Spiral Sewn Buff 4in. (13035), 6in. (13034), 8in. (13033), 10in. with 1/2in. mounting hole (13037), or 10in. with 3/4in. mounting hole (13038).