Diablo Steel Demon, 2 Pack, 9 "x 14/18 TPI, Reciprocating Blade, Bi-Metal Liquid Metal Tooth Design, Lasts Up To 4 Times Longer Than Standard Blades, For Cutting Steel & Metal Composites 3/32" x 5/16", Features Perma-Shield Non-Stick Coating & Liquid Metal Technology For Maximum Durability & Speed, Specifically Designed For Maximum Performance In Metal Demolition Applications.