You can't see the difference between a Carbide Wheel Glass Cutter and a Steel Wheel Glass Cutter, but the difference is great. This is primarily reflected in the life and price. Since there is also a broad range of difference between carbides, we have selected the tungsten carbide that incorporates the best qualities for glass cutting. It is designed to deliver extremely long life and fine edge quality. CRL Fletcher® Gold-Tip® Carbide Wheel Cutter is ideal for industrial use, and continuous high production cutting, because its carbide gold tips last longer in a high use situation.