The product shown is the NT Cutter Circle Cutter Extension Slide CE-700P. Product Information: Purpose: This is a slide bar designed to be attached to the company's thin-material circle cutters such as "C-1500P" and "iC-1500P" to extend the diameter of the circles that can be cut. Supported Diameter: By attaching this extension slide, you can cut large circles with a diameter of 16 to 40 cm. Note: This product is the extension slide only and cannot be used without the circle cutter body.