I hope somebody here can help. I have been going over websites for the last hour with no luck.

I am looking for a tool that is V shaped on both sides of a flat piece of plastic. Down the middle is a slot for a pencil to draw a line. What you use the tool for is divide circles and hexagons. You place the circle down in the V and draw a line in the slot from the other side. When you remove the circle it has a straight line down the middle.

Thanks
Barry