[150 pieces of multi-grain sandpaper set] Our grinding wheel set provides you with the multi-grain sandpaper you need. You will get 150 orbital sander pads of 10 different grades, including 60, 80, 100, 120, 150, 180, 240, 320, 400, 600 sand. [High-quality structure] Our abrasive pads are made of high-quality alumina abrasives, which are durable and resistant to clogging. Alumina particles can provide fast cutting and smooth surfaces for your projects. [General compatibility] Our 5 inch (125 mm) grinding wheels are suitable for general orbital sanders. [8-hole high-quality back plate] The brushed back plate can quickly remove and replace sand particles and prolong the service life of each grinding disc. The 8-hole design is used for efficient dust removal. [Wide application] Your new brand grinding wheel is very suitable for grinding and finishing on metal and non-metal, wood, rubber, leather, plastic, stone, glass and other materials. Granularity reference: 60-120: Rough grinding series: used for grinding hard and rough materials, such as metal and wood. 150-320: Common particle size: used for regrind for coarse grinding. This particle size can basically meet the requirements, but it is not very high but can be formed. 400-600: Fine grinding series: used for high-end grinding of mahogany furniture, amber, antiques, etc. Notes: 1. Store sandpaper in a dry, ventilated place. If the sandpaper gets wet, its life will be shortened. The ideal temperature is between 18C and 22C. 2. This kind of sandpaper is dry abrasive. Do not spray water or wet grinding. 3. Use appropriate sandpaper model and sanding process. Choose the right particle size to achieve the superiority and cost-effectiveness of product polishing and maintain the quality of the parts.