Interface disc helps the long lasting abrasive last even longer and minimises heat build-up on the machines hook and loop pad. The open net structure of the backing has many advantages over traditional paper. Dust extraction is far more effective and the abrasive far less prone to clogging. The backing is far more durable than paper, allowing discs to be reused, ensuring the full use out of each one. The long lasting aluminium oxide abrasive grit produces good results on wood, paint, varnish, etc. Fits random orbit sanders of any brand fitted with a suitable backing pad.