Fein 120 Grit Perforated Sanding Sheets, 50PK are designed with aluminum oxide and a full resin bond to ensure fast material removal, reduce glazing, and extend tool life. These sanding sheets are for universal use on nearly all materials, making them a versatile choice for various sanding tasks. The perforated design allows for use with perforated backing pads and dust extraction systems, enhancing efficiency and cleanliness during work. Model Number: 63717112017