The Milwaukee 12 in. x 4 TPI - 5 TPI Pruning Reciprocating Saw Blade is made of grey steel and features a staggered tooth pattern that's ideal for pruning. It has sharp, fleam-ground teeth for efficient cutting. Its extra deep gullets easily remove chips for fast cutting. Extra deep gullets easily remove chips for fast cuttingUnique fleam ground teeth cut in both directions for clean cutsInduction hardened teeth for long life5 teeth per inch12 in. Length1/2 in. Universal Tang fits all SAWZALL'sThin kerf for flexible cutsSteel construction