Norton Norzon plus F826 fiber discs are ideal on stainless, alloy and for high pressure applications. Norzon plus F826 fiber discs are available in standard fastening system, Speed-Lok fasteners and patented AVOS Edger Speed-Lok styles. All Norton fiber discs feature a full resin bond system with heavy-duty fiber backing for increased strength, durability and tear resistance. AVOS - Allows View of Surface - fiber discs are available in select sizes with Speed-Lok fastening system. The patented hole design allows interrupted cut, reducing heat by up to 30 percent over standard round discs. Cooler cutting and air flow that pulls loose abrasive and swarf away from work surface result in longer discs life. Operators can grind for accurately with less rework, because the holes provide complete vision to the grinding zone. 5 degree back-up pad allows for grinding at 5 degree - 15 degree angle for greater utilization of disc surface and eliminates gouging of workpiece.