Bosch Edge Non-Ferrous Metal-Cutting Saw Blades start sharp, stay sharp and resist impact damage for long life. They are designed for tough jobs, because they are engineered with Brute Carbide, an extra-hard carbide formulation that increases impact resistance. They have Triple Chip Grind (TCG) Tooth Geometry designed for delivering maximum performance and high quality of finishing in highly abrasive materials. Designed with zero to slightly negative hook angles, they produce clean cuts without binding in extrusions, tubing or other delicate profiles. These blades are engineered for aluminum, brass, copper and other non-ferrous metals and PVC. To avoid warping, these blades have been built with expansion slots and a hard thick steel plate.