Features: This machined aluminum attachment for cutting purfling channels along edge of a profiled, unglued violin plate; an unglued fingerboard; or for rosette channels around a guitar sound hole (round or ovals). Easily cutting along edges of violin plates with accuracy, ensuring a clean and exact cut every time. It guides the cutter bit along tight curves and helps maintain constant routing distance from edge. This tool can be used for many types of wood instruments, such as violin family instruments, guitar family instruments. Great for use with various wood string instruments such as violins and guitars. Specifications: Materials: Alloy Color: Redness/Silver/Blue Size: about 10.6x6.6cm/4.17x2.6inch Package Includes: 1pc Violin Purfling Groover Jig note: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color of the item.