Using vacuum dust bags on KOBLENZ 12-16 gallon polypropylene wet-dry-blow vacuums will keep the drum clean for more suction power and keep the drum clean saving time from cleaning up a mess after the project. Conveniently captures dry debris like normal dirt, sawdust, sand and scraps that normally would damage a regular household vacuum. Easy installation and removal to be thrown away. Simply line up the hole in bag with the hose intake port on the front of the vac and stretch out bag as much as possible. It's much more convenient using a bag to catch the debris versus dumping the entire tank each time the vacuum becomes full.