CH Hanson 3 ft. x 4 ft. x 5 ft. 90 degree Aluminum Folding Layout Asquare Triangle is big enough to complete a job, and makes storage easy with collapsable feature Designed with simplicity, making the product easy to use for quick and accurate work Makes perfect right angles, good for general layouts Valuable tool for anyone involved in carpentry, layout, angle layout, squaring, framing timber, masonry, pavers and much more Only true 3 x 4 x 5 square, providing an accurate measurement with every use