Bosch Edge 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 C6 micrograin carbide formulation that increases impact resistance. They have Half-Bevel Grind (HBG) Tooth Geometry designed for delivering maximum performance and high quality of finishing in tough ferrous metals. Designed with positive hook angles, they produce fast cuts with minimal burrs. They are designed for mild steel plate, steel studs, angle iron, bar stock or pipe. To avoid warping, these blades have been built with expansion slots. These blades also feature control cut shoulders to reduce kickback, and they have body slots for excessive heat.