0-degree tooth rake for steel 7-degree tooth rake for thinner & softer metals like aluminum.Specialized Blade Configurations The Morse Metal Devil cuts through tough metals quickly and smoothly due to it"s unique combination of manufacturing quality, metallurgy and blade configuration.TCG (Triple Chip Grind) Cutting Tip Configuration makes all tips strong since the load is shared between teeth. This maximizes the resistance of each tooth to chipping.Blades with more teeth are used for finer cuts and to cut thinner materials.Blades for cutting steel have 0 degree rake. This configuration creates a stronger tooth with more carbide where the cut is being made. Blades for cutting softer aluminum and thinner metals have 7-degree rake. This creates a more foreward cutting action. Fewer seconds per cut. More than 700 cuts through 12-inch by 3/8-inch aluminum plate. Our testers wore out before the blade did. Cuts Metal Faster The Morse Metal Devil cuts through steel, iron and aluminum with minimal frictional drag. Consequently, the time savings are dramatic and important to anyone trying to get more done in less time.In laboratory tests, the Metal Devil cut through 6-inch by 1/4-inch thick steel plate in less than 12 seconds on the first 20 cuts. Cuts Metal Longer The unique metallurgy of the carbide tips and hardened steel inner plate combined with the configuration of the teeth and manufacturing quality create a circular saw blade that makes more cuts in metal than other blades you attach to a circular saw. After watching a Morse Metal Devil; blade make 700 cuts in 12-inch by 3/8-inch Aluminum Plate, our laboratory testers wore out before the blade. Tests cutting angle iron and steel plate also showed that the Metal Devil can be expected to deliver long life performance on virtually any metal-cutting application.Cutting through angled steel.Cutting through corrugated aluminum.The Importance Of Being Cool A big factor in its superior perforance is that the Metal Devil cuts cool and therefore does not melt aluminum along the cut line. The unique metallurgy and tip geometry of the blade and cutting tips means that virtually no heat is transferred to the inner plate or the material being cut. Cool Cutting Means Safer Cutting Imagine cutting through a piece of solid steel then immediately picking up the pieces by the cut edge. With the Metal Devil you can do it. Think of how much time you"ll save without having to wait around for parts to cool before you pick them up.The Morse Metal Devil also minimizes the sparks generated when cutting. With limited sparking and cool cutting action, the chance of sparks smoldering in nearby materials or of being burnt when picking up a freshly cut part are eliminated.Cool Cutting Means Cleaner Edges Cool cutting means that painted surfaces will not melt at the cut, leaving paint right to the edge. This is especially helpful when cutting prefabricated building materials such as metal roofing and siding.