Circle Jig for manual milling machines. Can be used in subwoofers, door cards creation, furniture production and other manufactures. It is intended for milling round contours (rings, holes, circles) with a radius from 17 to 370 mm. Video manual: https://www.youtube.com/watch?v=uJdn0NevAHc 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: 385x170x38 mm.