Delphi Uses the Supercutter to Cut Thousands of Sheets of Glass Without Changing Heads Developed 30 years ago, Supercutters outlast other cutters by up to 25 times Toyo's Supercutters live up to their name. Comfortable to hold and easy to use, each cutter is self-oiling (when pressure is applied) for a free rolling wheel and consistent score line. The wheel is made of durable carbide steel that outlasts conventional cutters. Cutter heads are replaceable. The Brass Supercutter features a cross-hatched metal barrel which guarantees a sure grip while scoring.