MK Morse HHB12182432T10 18/24/32TPI 12-Inch Bi-Metal Triple Tooth Hack Saw Blade, 10-Pack Start with 32tpi, move to 24 tpi for more aggressive strokes, and complete the cut with 18 tpi Sections of blade can be isolated for different applications Cust wood, plastic, or any machinable metal, including conduit, stainless steel tubing, copper tubing, angle iron, structural materials and more 10 blades per pack Made in USA