Our 3" Resin pucks have a velcro back for easy attachment and switching of grits. With beveled edges for seamless passes, this cost effective tool will deliver an stunningly deep and clear shine. They are available in 50, 100, 200, 400, 800, 1500, and 3000 grit with an approximate lifespan of 5,000 square feet. Don't let the size fool you. These are the real deal.