18 TPI with bi-metal construction, these Super-Tough band saw blades outlast conventional blades up to 3 times, requiring fewer blade changes. For cutting stock 5/32" to 3/16" thick; three blades per pack. Matrix II high speed steel teeth with 8% cobalt, electron beam welded to a tough durable backing with high flex life for faster cutting & longer life. Recommended for cutting aluminum, angle iron, bronze, brass, copper, galvanized pipe, mild steel, & tougher steels including stainless, chrome, tungsten steel, plus other problem material at slow speed. Use with portable band saws using 44-7/8" x 1/2" x .020" blades