Bi-metal, Matrix II steel with 8 percent cobalt provides maximum durability, 3? shank angle positions the blade for most efficient cutting action resulting in longer blade life, Wood cutting blades have a 5? hook angle that provides fast, aggressive cuts through the toughest materials, Metal cutting blades have a wavy set design that ensures sharp cutting edges are always in contact with material for faster cutting, 6 piece set includes one 6 tpi Wood cutting blade DW4802 (2583-7428), one 10 tpi Wood cutting blade DW4806 (2583-7535), one 14 tpi Metal cutting blade DW4808 (2583-7444), one 18 tpi Metal cutting blade DW4811 (2583-7493), one 24 tpi Metal cutting, blade DW4813 (2583-7501), and one 5-7 tpi Wood cutting blade DW4847 (2583-7469), 6"" length, Carded, Length: 7, 75, Width: 7, 5, Height: 6 SKU: JNSN30796