Check the listing for details. (50) 3” Scotch-Brite Roloc TR PRECISION Surface Conditioning Disc Extra Coarse. Condition: New. Listed at 52.95 USD. You will receive 50 of the discs shown in the photos. They are being removed from a bulk case so they will come repackaged. NOTE: This is a new product line from 3M called “Precision Surface Conditioning.” They use ceramic grain abrasive as opposed to aluminum oxide. Ceramic grain is sharper and more durable than aluminum oxide. These discs cut faster and last longer than normal Scotch Brite surface conditioning discs. — Scotch Brite brand. Made in the USA by 3M— 3” Diameter— Extra coarse precision ceramic grain abrasive embedded in a tough non-woven material. — Roloc TR attachment These extra coarse discs are aggressive and can replace 150 grit fibre and flap discs to reduce process steps. RECOMMENDED APPLICATIONS: Polishing, Cleaning, Blending, Light Grinding, Light Deburring, Finishing, Edge Break, Radius Suitable for low pressure applications on aluminum and soft metals, or low to medium pressure applications on carbon steel, mild steel, stainless steel, and other hard metals. _gsrx_vers_1480 (GS 9.1.1 (1480))