Genesis GAMT531T 1-3/4-Inch Titanium-Coated Bi-Metal Flush Cut Blade 1-3/4-Inch wide Titanium-Coated blade for plunge cuts and flush cuts in nail-embedded wood, copper, aluminum, other nonferrous metals and mild steel Titanium-Coated Bi-Metal construction for longer life and durability when cutting metal and wood material, 5 times longer life than Bi-Metal blades 21 teeth per inch blade cuts up to 2-1/4-Inch deep Primarily used for "Cutting" with your Oscillating Tool Genesis Universal Quick-Fit Oscillating Tool Accessories fit most standard AND tool-free oscillating tools, including the popular Genesis GMT15A