This updated bow-bending tool is designed for deck, fence and mortise-and-groove plywood. Also suitable for woodwork materials such as floor, tongue and groove ceiling, wood board, paneling 26 inches (66 cm) long. The U-shaped joist grip bar has a maximum thickness of 1-7 / 8 inches (4.8 cm), and the compression lever allows 90-degree and 45-degree tilt to meet your needs Heavy-gauge steel construction makes our deck board straightening tool strong and steady, you can use it for many years This board bender deck tool takes out the bow so you can make a nice clean deck with boards space matching for almost all natural deck wood slats come with a bow to the left or to the right Adjustable ranging from 1.6 to 2.8 to satisfy the different joist sizes of needs, more convenient in decking board installation and saving labor and time.