The Next Generation Wrecker is designed for Multi-Material demolition cutting. This means it has the capability of cutting nail embedded wood, plastics and a variety of metals. This blade has 25% more high speed steel for increase life and durability. With all of these features, the Next Generation Wrecker is a true demolition blade for the professional user. The Milwaukee 48-00-1706 contains 10 blades. The Milwaukee 48-00-5202 contains one Thick Metal SAWZALL Blade. The MILWAUKEE TORCH with Carbide Teeth for Thick Metal SAWZALL Blade cuts longer, cuts more, and cuts faster. This carbide SAWZALL blade is designed with Carbide Teeth for longer life vs. bi-metal blades in black iron, rebar, stainless steel, cast iron, and more. The 8 TPI design is ideal for fast, smooth cuts in thick metals.