Attach our Purfling/Sound hole Router Guide to your tool to cut purfling channels and sound hole rosettes This machined aluminum attachment for cutting purfling channels along the edge of a profiled, unglued violin plate; an unglued fingerboard; or for rosette channels around a guitar sound hole (round or oval). It guides the cutter bit along tight curves and helps maintain constant routing distance from the edge. It guides the cutter bit along tight curves and helps maintain constant routing distance from the edge This Tool can be used for many types of the wood instruments such as violin family instruments , guitar family instruments etc. Colour:Blue Material:Aluminum+Brass+HSS Package Contents: 1 x Violin Purfling Groover Jig Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.