MAGBIT 732.1214/18T MAG732"Rapid" Fast Metal Cutting Blade, 12-Inch by 1-Inch by 0.043-Inch, 14/18 TPI 1/2-Inch shank blades With cobalt that outlasts standard blades 20% faster rough cuts in metal pipe, channels, tubing, angle iron up to 4-Inch. Rescue model Faster cutting and longer lasting Sold in packs of 5