This tool is used to hold deck boards straight while fasteners are being installed. It cam locks into place and applies much more bending power than other methods of straightening deck boards. Cam locks in place for true hands free “one man” operation. Capable of bending multiple boards simultaneously. High quality anodized aircraft grade aluminum with hardwood handle. Adjusts to various sized joist thicknesses. Easily reversible handle with NO EXTRA TOOLS NEEDED