The Woodpeckers Hook Stop converts your Woodpeckers Rule into a hook rule. Imagine being two or three feet away from the zero end of the ruler. Rather than straining to keep the zero end flush with the board’s edge, you can simply hook that end onto the board and start measuring. It’s a straightforward yet effective solution for accurate measurements. Like all Woodpeckers tools, the Hook Stop is made in their own shop just outside Cleveland, Ohio. Please note that it’s not compatible with older Woodworking Rules or vintage 6-inch rulers. Rulers purchased after 12/1/2011 should have the necessary threaded holes for attaching the Hook Stop. It fits 12-inch, 24-inch, 36-inch, and 48-inch rulers but is not compatible with SERX Straight Edge Rules.