If you ever have difficulty cutting circles and ovals, this tool ought to change your luck. From Fletcher-Terry, the folks who invented modern glass cutting, we have the Oval/Circle Cutter. This amazing, solidly built contraption allows you to cut ovals from 4-1/2 in. to 24 in. and circles up to 21 in. in diameter, all with precision and relative ease. It is equipped with an easy-to-operate suction unit to ensure that it stays put while cutting. Uses a 134 degree tungsten carbide wheel.