Sandpaper and grinding wheels are categorized as coarse abrasive tools. These tools employ larger abrasive grains which enable a coarse and fast removal of material. Examples of coarse abrasives include machines used in metal recycling that scrape paints, rust, and debris from scrap metals. Also, stone working entails the rough cutting of huge blocks of stones to smaller pieces of more usable shapes. Like rough abrasive tools, coarse rough abrasive tools are known to leave the surface unsmooth and lacking the necessary refinement polish prior to polishing.
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