Handheld air-powered vacuums create suction to draw chips, sawdust, and other debris through the vacuum nozzle and into the removable collection bag at the back of the tool. They can attach to a hose instead of the bag to collect debris in a larger container. Also known as pneumatic vacuum guns, they have a handpiece that connects to a compressed air supply and a trigger or other actuator that starts and stops suction. They accept attachments such as crevice tools to reach into tight spaces and brushes to sweep off dust and debris.