- Wholesale - Closeout - 6" 18TPI BI-METAL RECIP SAW BLADE - 6" Metal saw blade. - Cut with accuracy and precision using DeWalt 18 TPI Bi-Metal Reciprocating Saw Blades. - These blades are the perfect remedy to your old, chipped or dull tools that are impeding the success of your home and work projects. - The versatile design allows you to smoothly cut a range of materials including mild steel, aluminum pipe, wood and drywall. - The anti-stick blade allows you to keep up the pace as you work, reducing friction and annoying gum up.