Black Hawk 2" Mini Zirconia Flap Discs are manufactured using premium Zirconia grain and European cloth. 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. The flap disc design offers much longer life than standard flat quick change sanding discs. As the disc is used the flaps where away revealing new, sharp sanding paper. The discs are male-type R and are designed to be used on a die grinder with a roll-on female type quick change backing pad attachment.