Hi, my name is Kevin and on behalf of Expert Village, I'm going to show you how to make a circle cutting gig for a router. A circle cutting is exactly what it sound like. It is a gig that you build for your router. That you can use to cut circles with. And that can be a template for something or if you have a round table top that you have rough cut and you want to put a finished edge on it. You want to do it with a router. You can do it with that. You can also use it to cut half circles, for gigs, or just templates. It is a pretty versatile thing. Its really easy to make, and I am going to show you how to do that right now. What you do is take your router. Get yourself a board. This would be a small circle, but get yourself a board about a little bit bigger than the base and drill a hole through it big enough for most bits to fit through. This is a three quarter inch hole. It will fit almost all bits. You want to put a straight bit on there. And what you want to do is fix the router base to the actual piece. You can do this in a number of different ways. You can mortise down into it, or you can screw some holes through your base where you can take screws and screw right into your base. Which is a really good thing to do. Once this router base is permanently attached onto this piece. What you do on this end, is you put a screw over here at this end of the base, and screw through to the piece your going to be working on. If you have a specific size circle what you can do is flip it over where that screw hole is. You measure from the screw hole over to the hole to the edge of the bit. That will tell you what half the distance of the circle is going to be. So if you want a six foot circle. You are going to need to measure three feet from the edge of the router bit to where that screw is. Because what is going to happen. Is when you run this. You turn on your router. You drop your bit down in there. It is going to pivot off this arm right here. So it will make a perfect circle, because it will be pivoting from this one point over here, and it will give you a perfect circle every time. Or half circle if that is all you need. But yeah you fix it right here and measure to the edge that will give you half the distance of what ever circle you are about to cut.