New Tap Wheel Technology Gives You A Better Score and Break. For Glass up to 3/4" Thick. Smooth Cutting Action. For the glazier that cuts heavy glass, the Toyo TC600SVB Heavy Glass Cutter is a tool that stands apart from the rest of the world in glass cutting technology. Length: 6 in (152.4 mm) Additional Product Information: With this new "Tap Wheel" Technology, thick glass is now easier to cut than ever. The new wheel has eight "cams" inside the axle bore of the cutting wheel which causes eight "taps" per revolution, resulting in a superior score. Longer wheel life and a more consistent score line make this cutter far more advanced than others of the same type.