The Pumper helps prevent neck injuries to the auto glass technician. Automobile windshields are now installed with a thick band of urethane across the bottom. This thick band is difficult to cut from the outside of the automobile and must be cut free from the inside. Technicians sometimes use the top of their heads to push out on the top of the windshield as they cut across the bottom. We developed this inflatable bag to push out on the glass for you. It exerts over two hundred pounds of outward pressure over a one-foot area. You will find it useful in any area where you want to exert constant outward pressure while cutting urethane. Made with a tough, vinyl-encased exterior.