Gold Discs P40 to P500 Grit Velcro Discs 150mm Dia 7-Hole. (Priced Per 1000 Discs). (2 Weeks Lead Time). (Choose a Grade from the drop down list). Gold is a durable product very well suited for sanding at high speeds. Gold is an all-round sanding material that can be used for many purposes. In order to achieve an optimal sanding result, the semi-open grit binding and special stearate coating are designed to prevent clogging and pill forming.