Abrasive Flap Disc; Type Flat, Type 27; Diameter 4-1/2 Inch; Arbor Hole Size 5/8 Inch-11 TPI; Grit Size Number 40; Abrasive Material Ceramic and Zirconia Alumina; Backing Material Phenolic; Speed Rating 12000 RPM; Color Blue; Application Finishing, Grinding; Hub Size 5/8 Inch-11 TPI; Capacity 4 Ounce; Grain Type Zirconia Alumina; Used on Right Angle Grinder; Applicable Standard ANSI B7.1

A Thicker Disc with Larger Flaps which Conforms to Curved and Irregulars Surfaces, Resulting in a Consistent Finish; Flap Design Results in 30-40% Longer Life than Standard Flap Discs; Thicker Phenolic Back Provides More Stability for the Thicker Cloth Configuration; Contaminant-Free (Contains Less than 0.1% Fe, S, Cl); Self-Sharpening Zirconia Alumina (Za) Grains Hold up Under High Temperatures and Extreme Pressure; 5/8" 11 Metal Nut Allows for Quick Spin-On, Spin-Off Changeover and Eliminates Cross-Threading or Sticking to Spindle Due to Heat Build-Up; Best on Carbon Steel, Structural Steel, Stainless Steel and Cast Iron; Made in USA