Film-backed abrasive discs for high-finish auto body sanding applications Aluminum oxide abrasive offers a fast cut and long disc life Durable film backing is tear-resistant and provides a consistent finish 5-hole or 6-hole design of many discs helps keep dust from disc surface, reducing loading Hookit attachment system makes for fast disc-change-outs and longer disc life For industrial/occupational use only. Not for consumer sale or use.