The Do it Best 10-Piece Bi-Metal Reciprocating Saw Blade Set offers professional-quality cutting with blades ranging from 6 to 9 inches. Built with heavy-duty steel construction, these blades last up to 50 times longer than carbon steel, and the varied TPI makes them versatile for multiple applications including metal, PVC, wood, and wood with nails. This 10-Piece set includes (2) 6 In. 6 TPI blades, (1) 9 In. 6 TPI blade, (3) 6 In. 24 TPI blades, (3) 6 In. 14 TPI blades, and (1) 9 In. 18 TPI blade.