These triangular Flex sanding papers are ideal for grinding joint filler in drywall construction. When fitted onto a sander, their triangular shape makes them ideal for processing corners and edges. The sheets are punched to enable dust extraction. They have hook and loop backing and are suitable for the following Flex models WSE 7 Vario Plus WST 700 VV Plus. The FLX348570 Sanding Papers have the following specifications Grit size P100 Grit type Fine Height 290mm. Pack size 25.