66Pcs 2 inch Sanding Discs Type R Set Assorted Roll Lock Quick Change Sanding Pads Featuring advanced processing technology, we have increased the quality and toughness of these quick change sanding discs, resolved problems like peeling off/breaking/deforming, and thus extended the durability for long-term use. Different Sand Discs full of Your Various Needs , Wide application to stainless steel, standard or alloyed steel, non-ferrous materials and alloys,wood plastic and fiberglass, for cleaning, finishing, polishing, blending and deburring applications. NON-WOVEN DISCS RAPID PREP: BETTER CHOICE FOR FINISHING AND BLENDING APPLICATIONS Most consistent cutting and finishing of surface conditioning products on the market.Combines fast cutting speed with the finish of finer grits.Reduce process times by 50+% by combining multiple grit sequences to 1 step in a blending operation.More resistant to edge wear; up 4X life vs. competitive products.Friable grain structure keeps Ra specs throughout disc life and reduces scrap and rework.Smear-free, even on high nickel content alloys.Will not load on aluminum and soft metals, as competitive products may.Extended form holding. Lowest total cost of consumable tooling per workpiece. Tool-free, twist-on and -off fastening systems make fast work of disc changes to maximize productivity by minimizing downtime. All Quick-change Back-up Pads Have A 1/4 Solid Steel Shank. Replacement Medium Density Rubber Pads for Quick-Change Back-up Pads. Specification SIZE(D) 50mm 2 inch BRAND SI FANG BACKING Cotton Standard ABRASIVE Zirconia Alumina, Aluminum Oxide, Silicon Carbide ATTACHMENT TR SHANK 1/4inch hex and round CLOTH DISCS light- to medium-pressure grinding; blending, leveling and finishing applications; for use on contours or flat surfaces NON-WOVEN DISCS Better Choice For Finishing And Blending Applications Features. Medium-light stock removal, deburring, rust removal, blending, cleaning and finishing, polishing QUICK-CHANGE RAPID STRIP DISCS Surface Stripping, Surface Deburring & Blending Buffing/Polishing Discs Designed for light removal of paint or rust without affecting the base product Non-woven Discs: Better Choice For Finishing And Blending Applications Strong, Y-wt., 2-ply cotton backing construction for extended durability and reduced edge-wear Additional 3 surface preparation discs for your other job sanding needs