Glass Cutter Is a Tool Specially Used for Cutting Glass, and Its Tool Nose Parts Are Usually Made of Diamond Or Alloy Materials with Greater Hardness than Glass. This Design Enables the Glass Cutter to Draw a Groove on the Surface of the Glass. Due to the Sharp Bottom of the Groove and Great Stress Concentration, Brittle Glass Can Easily Crack along This Groove, Thus Realizing Accurate Cutting. 1