Mirka Abrasives INC 23-615-180 - 180G - Bulldog Gold - 5" 8-HOLE GRIP DISC 50/BX - Premium 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 - C & D-weight backings are 50% stronger than other premium brands using A-weight backings - Made with an anti-load stearate to provide increased life.