Carbide alloy cutting wheel, high hardness and sharp cutting, more smooth cutting, can cut 5mm-15mm thickness glass, an ideal tool for stained glass, diamond and minerals cutting This tool is used to make a shallow score in one of the surface of the glass that is to be broken to two pieces. The scoring makes a split in the surface of the glass which encourages glass to break on the score. Designed for comfort, durability, and performance. This industrial grade glass cutter has a pencil design in order to ensure comfort and performance for the user.