Good Sandpaper Materials: Sandpaper is made of high - quality aluminum oxide, ensuring cutting. Featuring waterproof and tensile - technology, these sandpaper sheets can be used for both wet and dry sanding Simple and Convenient Operation: The various shapes of hook andamp; loop sanding blocks are interchangeable, making it easy to switch between different sanding blocks, saving you time and labor. Meanwhile, it's suitable for detailed polishing, especially in tight spaces and corners. The design ensures that every project is within your reach Soft and Material: The automotive sanding blocks set are made of high - quality polyurethane foam. They're soft yet , ideal for sanding delicate surfaces like crown molding and baseboards without damaging workpieces Hook & Loop Hand Sanding Block Set: This set includes 16 sanding blocks in various shapes and 40 hook and loop sandpaper sheets. Sandpape are 5 sheets each for 8 grits: 40, 60, 80, 120, 180, 220, 400, 600 Wide Range of Application Scenarios: The sanding block is widely used, Whether in home repair, handcraft or car grinding, you can enrich the function of the sanding block to make your work easier! Be confident that this automotive sanding block surprise you, Weight: 1.45064168396 Pounds, Manufacturer: Hipzeepo