Review on MK Morse HHB12182432T10 12 Inch Bi Metal by Ananta Crowley

These are great blades for hand sawing aluminum or steel. The thin 32 TPI is on the front third of the blade, the 24 TPI is in the middle and the 18 TPI is closest to the saw handle. This gives you three advantages. First, you can use the 32 TPI section to start cutting. There is no need to retract the blade to start cutting. Second, cutting fine to medium and coarse front to back allows you to get the most out of your shot. Start your pull at the thinnest part of the blade to reduce the chance of the blade binding and bending. Finishing the stroke on the rough part of the blade helps remove material quickly where the blade is hardest. The third advantage is that you can use the 32 TPI section for a smooth cut without leaving a burr. The only thing I wouldn't use these blades for is thin pipe and sheet metal. For these, you're probably better off going with a straight 32 TPI blade unless you don't mind using only 1/3 of the blade and you want a blade that can do it all. Like any hacksaw blade, they work best in a quality, high strength frame such as the Morse HHBF02 or Lenox HT50 with a quality wax lubricant such as Olson Stick.