4-1/2X5/8-11 Z3-40 T27XL 100% ZA FLAP DISC XL flap disc have 40-60% more material than regular density flap discExcellent on carbon and stainless steelPremium 100% Zirconia offers maximum cutting capacity, strong edge stability, cool cutting with light pressure and long lifeRecommended for aggressive use and heavy duty applicationsActive grinding agent provides cool cutting with light pressurePoly-cotton heat treated backing Dia. 4 1/2 inTool Shape Type 27Arbor Thread TPI or Pitch 5/8 in 11Grit 40Speed 13300 rpmAbrasive Material Zirconia AluminumApplications Deburring, Deflashing, Rust Removal, SnaggingApplicable Materials Ferrous Non-Ferrous Metals, Stainless Steel, High Tensile Alloys, High Temperature Alloys, Heat Treated Steel, High Tensile Non-Ferrous MetalsUsed With Right Angle Grinder/SanderQuantity 10 per cartonWt. 0.36 lb