These premium quality aluminium oxide 305mm sanding discs are resin bonded to provide improved grain adhesion, anti-static qualities and long-lasting high performance. The heavy-duty E-Weight backing paper makes the sanding disc more durable –– able to withstand the toughest jobs. These discs have a strong self-adhesive PSA (Pressure Sensitive Adhesive) backing. Ideal for sanding and finishing wood, metal, aluminium alloy, painted surfaces, plastic and fillers. Compatible with all 305mm bench sanders.