Dewalt DWS5100 12-Inch Dual-Port Folding Rip Guide is a circular saw attachment. It has a 12-Inch ripping capacity on the left side for common rips such as stair treads and risers, and up to a 14-1/2-Inch ripping capacity on the right side for maximum width rip cuts. The DWS5100 is equipped with a lightweight and durable aluminum construction for portability and strength, and can fold down to 19-Inches long by 3-Inches wide for easy storage. It features permanently laser-etched markings for accurate and fast setting. Specs: Max Rip Width Left Side - 12-Inches; Max Rip Width Right Side - 14-1/2-Inches; Minimum Rip Width - 1/2-Inch; Folded Length - 19-Inches; Folded Width - 3-Inches; Folded Height - 1-Inch; Weight - 1.2 pounds.