Utilize your router to cut best arcs or circles from 8" to 48" with this router compass circle reducing jig. This router compass can be personalized drilled to fit any plunge router on the marketplace. Includes a steel center pin pivot point that moves in a recessed groove and can be secured firmly via a knurled knob. Specific circle setting are easy using the published college graduations in both SAE and also statistics. Compass is made from challenging 1/4" thick acrylic.