Excel Blades 7/16 inch Pounce Wheel, American Made Serrated Tracing Wheel, Perforator and Embossing Tool 100% Made in the USA with an aluminum handle and interchangeable hardened steel serrated tracing wheel head, can be used for tracing lines on paper, cardboard, foam, fabric, soft metals, and more Perfect perforated cutter for hobby, arts and crafts, sewing supplies, and industrial uses. Used for tracing, pattern making, marking, quilting, sewing, wood working and other transferring applications Versatile head can be locked for straight line work or loose to allow for circles or curved designs Comes with 7/16 inch wheel (14 teeth per inch) head size