Mirka 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. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.