The WINBAG® is a very powerful hand operated inflatable air cushion made of fiber reinforced material that will save you countless hours on the jobsite. It is designed to provide a maximum pressure of up to 220 lbs. in a wide variety of applications. Save time installing windows, positioning heavy doors and leveling furniture, kitchen cabinets and household appliances, etc. Can be used for spaces from 3/32" to 2". The soft air cushion doesn't leave marks and protects your project.