Weiler Tiger® Big Cat® High Density Flap Disc, 7 in dia, 40 Grit, 5/8 in-11, 8600 RPM, Type 27 (804-50843) EachA thicker disc with larger flaps which conforms to curved and irregular surfaces while producing a consistent finish 30 40% longer life than standard flap discs Ideal for a working angle less than 15 Phenolic backing Diameter = 7 in Tool Shape = Type 27 Arbor Arbor Thread TPI or Pitch = 5 8 in 11 Grit = 40 Speed = 8600 rpm [Max] Abrasive Material = Zirconia Alumina Hub Mounting = Threaded Hole Applicable Materials = Most Metals Type = Arbor Hole Disc