60 Pieces Sanding Sheets are designed for use with a sander, higher speed sanding, faster dust extraction and heavy duty removal, perfect for metal and non-metal grinding and polishing , wood, rubber, leather, plastic, stone, glass and other materials. Features: - Thickened D paper backing, high quality backing paper to prevent tearing. - Made from durable and calcined abrasive aluminum oxide grit, good sanding effect. - High strength, durable and anti-static resin bonding system. - 6 kinds of grits, in 40# 60# 80# 120# 180# 240#, totaling 60 sheets. From coarse to fine, covered all grades of grain. - Sanding Discs Pads are easy to split, with serrated piece cutting, hook and loop design, easy and quick to stick. - With 2 extra tips for replacement, fits Black and Decker 140mm hand sander and other 140mm detail sanders. Notes: 1. Please check and replace the sander base plate frequently when it is worn out. 2. Please use it in a dry place, do not store it in damp conditions.