Diablo, Steel Demon, 9" x 20/24 TPI, Reciprocating Blade, Metal Cutting, For Thin Metal, Delivers 4 Times The Life Of A Standard Bi-Metal Reciprocating Blade, Features A Hardened Tooth Technology For Superior Durability In Extreme Applications, Perma-Shield Coating For Reduced Heat & Friction, Dual Tooth Design For Better Control, Bulk.