Edge Circular Saw Blades start sharp, stay sharp and resist impact damage for long life. They are designed for tough construction jobs, because they are engineered with Brute Carbide, an upgraded C3/C4 micro grain carbide formulation that increases impact resistance. They have face ground teeth for clean cuts. A round 5/8" arbor with a diamond knockout makes it compatible with both sidewinder and worm drive saws. 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.