Product Description Aluminum Oxide & High Density Sponge material make grinding more efficient. Sanding Sponge Type 60# is Equivalent to The Coarseness of Sandpaper 100P, Sanding Block 80# = Sandpaper 120-180P, Sanding Block 100#= Sandpaper 240-400P, Sanding Block 120# = Sandpaper 500-600P, Sanding Block 180# = Sandpaper 800P, Sanding Block 220#= Sandpaper 1000P. What are the advantages of MgcTolBox sanding block kits? Assorted Grit Sanding Blocks：60/80/120/180/220 Sand sponges in 6 sizes from coarse to extra fine. Low grits for sanding down previous finishes and higher grits for final finishing and polishing. Each sponge comes with quality abrasive material on 4 sides. It can be cut arbitrarily according to the grinding requirements. Wet and Dry Sanding Uses of Wet Sanding Blocks Excellent on wet or dry sanding, can be used directly in the water. The resilience of the sanding block is excellent, plasticity is strong, and it is not easy to tear. Sand paper brick for wet polishing to minimize dust. Any clogging up with sanded material, just rinse with water, Air drying, and reuse. In the kitchen, clean metal pans, stove grease and stainless steel sinks. In swimming pools, stained tile surfaces can be cleaned. In the courtyard, scratches on the tile pavement can be treated. In terms of shipping, it can clean and polish the rust and corrosion of ship accessories. Furniture Refurbishment ＆ Primer Treatment Sanding blocks for wood, ideal for a broad range of uses from wood stripping to final finishing. Sink Stain Cleanup, Remove scratches Our washable and reusable sanding sponges are perfect for scrubbing and cleaning sinks. Metal Rust Removal ＆ Stubborn Stain Treatment sanding sponges removes stubborn stains from stainless steel cookware. Also suitable for porcelain and glass. Auto Parts Repair ＆ DIY Creation Sanding Blocks is suitable for polishing auto parts, plastic shells, amber jade, DIY and craft creations.