This set includes 30 round sanding discs sized 5 inches (125 mm) with hookandloop backing, designed for standard 5 inch orbital sanders. The discs cover a full finishing progression with six grits: 320, 400, 600, 800, 1000, and 1500, providing versatility from material removal to finishing touchups. Key benefits Quick disc changes: hookandloop backing enables fast, tool disc swaps for efficient workflow. Progressive finishing: six grits allow you to move from rough material removal (320400) to fine polishing (8001500) in a single project. Compatible with common sanders: designed for standard 5 inch / 125 mm hookandloop sanding discs on most orbital sanders. Key attributes Size: 5 inch (125 mm) round discs Type: Round sanding discs with hookandloop backing Grit range: 320, 400, 600, 800, 1000, 1500 Quantity: 30 discs in total Material: abrasive material not specified in the listing Compatibility: suitable for most 5 inch hookandloop orbital sanders Performance: suitable for smoothing, finishing, and prep work across various projects Use cases Wood finishing and cabinet work: start with 320400 for rapid material removal, then progress through 600800 and finish with 10001500 for a smooth, readytofinish surface. Paint and varnish removal with surface preparation: use the coarser grits to strip and level surfaces, followed by finer grits to prepare for coating. Metal deburring and smoothing: light deburring and edge blending with mid grits, finishing with very fine grits for a clean, satin finish. Notes Each disc is designed for compatibility with standard hookandloop sanding hubs on 5 inch orbital sanders. Abrasive material is not specified in the listing; the set provides six grit levels for versatile sanding tasks.