Available in Coarse (Tan), Medium (Red), or Fine (Blue) If you're working with metal surfaces, these BHA conditioning discs are exactly what you need. They're 5 inches across and come with that handy hook and loop backing that makes swapping them out super easy - no more struggling to change sanding pads mid-project 7 inch Velcro Surface Conditioning Discs feature non-woven fiber infused with aluminum oxide grains adhered to a Hook & Loop (velcro backing) for ease of removal and attachment. 3M Scotch-Brite PN-DH Precision Surface Conditioning Hook & Loop Disc 89223 Precision Shaped Ceramic 4 1 2 In Coarse Metal Polishing And Deburring Discs Disc Repair BHA Hook & Loop Surface Conditioning Discs For Metal Prep - 5 Inch Diameter, 10 Pack (Coarse Tan) 5 Inch Metal Prep Discs Coarse Coarse Tan Non Woven Discs For Metal Premium non-woven pad fill with aluminum oxide grains , Pack of 10 Discs 7 inch Velcro Surface Conditioning Discs feature non-woven fiber infused with aluminum oxide grains adhered to a Hook & Loop (velcro backing) for ease of removal and attachment 7 inch scotch brite surface conditioning discs with velcro back are perfect for use on steel as well as stainless steel and come in 3 variations of coarseness: Fine - Blue, Medium - Maroon/Red, and Coarse - Brown, 7 Inch Diameter Additionally, due to surface conditioning discs porous nature, they allow airflow during use and thus can be used on heat-sensitive metal for polishing, grinding, blending, finishing and deburring.