Premium quality PSA(pressure sensitive adhesive) discs in convenient roll form are ideal for use with Norton Disc Roll Dispensers on page 33. Simply tear off and apply self-adhering disc to Stick and Sand Back-Up Pad (see page 36). Packed in handy corrugated boxes for ease of use, and individually wrapped in polybags. For dust-free sanding, prepunched PSA vacuum assist discs are available in 5", 6" and 8" sizes.