1Versatile: Use as a pry bar or lever for door, window and cabinet installation. It can also be used as a car unlock tool or car repair. Practical home installation and repair tools. 2Durable: It does not leave any traces in the surroundings. The cushion is also reinforced with fibers, making it durable enough to be used again and again. 3Strong Load Bearing: Each air wedges is powerful enough to lift 240kg. This set has 4 air wedges. 4 used together, can lift up to 960kg, more stable and safer. 4Convenient Storage: When fully deflated, the installation cushion is only 5mm thick, which makes it easier to wedge door clearances and installers' kits. 5Suitable Size: This door and window installation air cushion has a suitable size of 16x16cm / 6.3x6.3in. When installing, the size is more suitable for the furniture, and it is more comfortable and flexible to use.