Circle Jig for manual milling machines. Can be used in subwoofers, door cards creation, furnirure production and other manufactures. It is intended for milling round contours (rings, holes, circles) with a radius from 40 to 520 mm. Video manual: https://youtu.be/guB3MtlrlPw It is a universal device for manual milling machines. Smooth size adjustment. Device has marking on the upper side to mark up mounting holes of your router. Easy to use. Size of the tool: 435x170x38 mm.