Shop vacuum cleaners clean either liquid spills or dirt and dust from floors and surfaces. Also known as wet/dry vacuums, they create strong suction to pick up nails, metal shavings, liquids, and other materials that could damage commercial vacuums. Their filter prevents dust and contaminants from recirculating when vacuuming dry materials and is usually removable for taking in liquid spills. These wet/dry vacuums typically have a large tank that holds dirt, debris, or liquids and can be detached for pouring out the contents when full. They're commonly used at workshops, auto shops, car washes, and construction sites.