Pearl Abrasive MAX458ZJEH 4-1/2" x 5/8-11" Zirconia EXV Type 27 High Density Maxidisc - Flap Disc, Hubbed, 80 Grit. Pearl's new EXV Zirconia Maxidisc is an ideal combination of performance and value. It is engineered with zirconia grains on a heavy duty coated abrasive cloth. The EXV Maxidisc is designed for grinding, blending and finishing on a wide range of metal and stainless steel applications.Medium to heavy stock removal on metals.Blending and intermediate finishing of metal surfaces.Weld bead removal.Paint removal.Base preparation for steel frame structures.Deburring and corner removal.Grinding, blending and finishing of stainless steel.Less flexibility.Max RPM: 13,300.For Metal and Stainless Steel.