Our Cubitron II Hookit Clean Sanding Abrasive Discs 737U combines the highest 3M technology for automotive repair Its longlasting triangular shaped grain and multihole pattern for superior dust extraction make the disc ideal for paint removal rough body filler shaping fine featheredging or final prep before blending or priming Our Hookit system makes for quick disc changeouts 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.