Precision Ground Tooth Blades Double tooth for excellent performance in hardwoods! Double tooth are easy to distinguish from skip tooth having two teeth together followed by a flat space for more efficient chip removal. Their razor sharp teeth cut faster, smoother, and more accurately in both straight and radius cuts. A unique tooth geometry and widely spaced gullets minimize burning. Made of the finest carbon steel for maximum strength, durability and longest blade life. Pack contains 6 of each of the following: 5RG - 12/8 Rev TPI - For accurate, tight radius cutting in materials 3/16\" (5mm) or thicker 7RG - 10.5/8 Rev TPI - For steady, close radius cutting in materials 1/4\" (6mm) or thicker. 9RG - 9/6 Rev TPI - For fast, close radius cutting in materials 1/2\" (12mm) or thicker