Practical design: mouse sanding sheets, suitable for the 140mm Black and Decker detail palm sander and other all 140mm detail sanders Material abrasive: aluminium oxide, durable and anti-static, good choice for sanding and polishing; backing: hook and loop, easy and quick to stick, sturdy and durable; pre-punched with 4 holes for dust extraction Wide application: 5 grits sandpaper assortment from rough to fine to satisfy almost all your general polishing requirements Package includes: 50 pieces mouse sanding sheets, 10x 40/ 60/ 80/ 120/ 240 grit These sandpapers are suitable for matched 4 holes hook side of sanding pad, please clean the dust and replace the old sanding pad before use, and these sandpapers are not suitable for adhesive sticker sanding pad