Special design for power saw use by the New York City Fire Department, by the auther of "Power Saw Use", tools #9. Designed for the NYFD for fire service ventilation as its #1 priority. Carbide tips that are twice the width and body of the blade lessen binding and increase the kerf of the cut. Blades are made of exceptional quality steel and carbide tips. Tips are attached by a patented interlock laser beam method that lessens protrusion into the gullet decreasing the risk of tooth breakage.