The GPT gravity feed air sand blaster is ideal for cleaning rust and paint off metal surfaces. Simply fill the container with abrasive sand, put on your safety equipment, aim and pull the trigger. Great for cleaning spark plugs, engine components and all metal objects. The GPT gravity feed air sand blaster is super efficient because the abrasive is drawn by gravity into the path of the air. This means better coverage and fewer blockages. This product also has a strong, featherweight plastic body making it easy to use, even for long, sustained use. Sustained and constant use is also a genuine option too, with a huge 600ml hopper on top of the gun.