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 PlusWST 700 VV Plus.The FLX349259 Sanding Papers have the following specifications:Grit size: P150Grit type: Very fineHeight: 290mm.Pack size: 25. Sanding Paper Hook & Loop Triangle 150 Grit Pack 25