Mirka Brand - Gold 23-615-060- 5" 8 Hole Vacuum Grip Discs (Velcro/Hook & Loop) Abrasive Sanding Discs 060 Grit - Brand New Box of 50 Discs Mirka Grip Discs = Velcro/Hook & Loop BackingPremium paper for finishing as well as heavy stock removal. Durable aluminum oxide grain delivers a fast, exceptionally long lasting cut.High strength resin bonded system. Maximized resistance to clogging and loading up. C & D-weight backings are 50% stronger than other premium brands using A-weight backings. Made with an anti-load stearate to provide increased durability and longer life.Automotive, Boat Building, Industrial, Woodworking & more.