Economical and Convenient Set: This 2" sanding disc set comes with 2 x 1/4" backings, 15 non-woven discs (coarse/medium/fine), 64 oxide discs 39;aluminum (40/60/80/120/180/240), 15 zirconium oxide discs (60/80/120), two black abrasive discs. discs and a wool disc C, 101 pieces in total. High performance: these abrasive discs combine superior quality sanding grains (aluminum oxide, aluminum oxide zirconium, aluminum oxide non-woven/SiC/wool) with strong roller rod base and high tenacity, long lasting with high abrasion resistance . They can operate up to & 39; 23,000 rpm. Quick change and clamp connection: simply twist it to connect or remove, convenient and efficient. When the sanding disc works, the direction of the disc thread is opposite the friction force, ensures stable operation even at high speed. Extended use: Matched sanding discs are excellent for use on surfaces made of stainless steel, alloys, iron, non-ferrous and other non-metallic materials such as wood, glass, ceramic, stone. Accommodates various surface conditioning and preconditioning, oil paint removal, rust removal, glue or glue removal 39;adhesive, sanding, cleaning, grinding, burring, polishing, finishing, etc. High compatibility: There are two 2 inch rubber pads in the set, can be attached any 1/4" electric drill, air grinding tool or die grinder. Excellent for most surface preparation work like stripping, grinding, polishing, reverse circle, mirroring, etc. Color: As picture shown Quantity : 1 set of 101 pieces