The WINBAG is a very powerful hand operated inflatable air cushion made of fiber reinforced material. It is designed to provide a maximum pressure of up to 220 lbs. and can be used to replace shims and wedges in a wide variety of applications. It gives the user infinite adjusting possibilities for example when installing windows, positioning heavy doors, levelling furniture, kitchen cabinets and household appliances. The WINBAG can even be used as a door stop.