Tiger Paw™ TY29 Coated Abrasive Flap Disc, 4-1/2 in dia, 60 Grit, 5/8 in-11, 13000 rpm100% zirconia alumina grain is fast cutting with aggressive action and long life, resulting in fewer changeovers and increased productivity Engineered poly cotton cloth features excellent grain retention for maximum disc life. Specifications Abrasive Material Zirconium Alumina Anchor Brand Catalog NO Applicable Materials Stainless; Steel Applications Deburring; Deflashing; Edge Chamfering; Grinding a Arbor Thread TPI or Pitch 5 8 in 11 Big Catalog YES