Abstract: A cast saw blade includes a hardened metal blank having a hub section and a cutting edge with an integral cutting depth guide. The cutting depth guide includes one or more apertures near the cutting edge. The blade includes a rounded sector blade cutting edge to minimize the amount of materials required. The cutting edge is only partially toothed, and partially smooth and dull. The blade is attached to a saw via a hub section that includes seven mounting holes around a central arbor, so that the blade is compatible with all prior cast saw hubs. The arrangement of the teeth makes a directional blade. The blade is easily reversed to cut in the opposite direction. Both sides of the blade are marked to indicate the cutting direction. The blade is formed through a chemical etching process to eliminate annealing and tempering after machining.