NATIONAL STANDARD - Zirconia Mini Flap Discs are a great option when seeking a long lasting abrasive that gets in those hard to reach spaces while lasting 10Xs longer than traditional quick change discs. Mini flap discs are similar to conventional flap discs but mount on a die grinder with a traditional compatible with roloc style backing pad. These discs are built for precision, durability and ease of use. The various grits offered can execute jobs from rough stock removal to fine finishing. Pack of 30 Type R - Male Roll On (Compatible with Roloc fastening system) NATIONAL STANDARD - Abrasives 3" quick change zirconia flap discs are used to clean weld lines and weld splatter, finishing, polishing, deburring, and other abrasive operations. Efficient quick change discs are used in various industries like automotive, transportation, mining, shipbuilding, foundries, construction, welding, fabrication, petrochemical, etc. Our abrasive products are made with quality materials and exceed ANSI and EU European Standards. We trust in delivering high-quality products to the end-user. Customer satisfaction is the lifeline of our brand. NATIONAL STANDARD - Zirconia Mini Flap Discs are a great option when seeking a long lasting abrasive that gets in those hard to reach spaces while lasting 10Xs longer than traditional quick change discs. Mini flap discs are similar to conventional flap discs but mount on a die grinder with a traditional compatible with roloc style backing pad. These discs are built for precision, durability and ease of use. The various grits offered can execute jobs from rough stock removal to fine finishing.