Diablo, 25 Pack, 9'' x 6-12TPI, Nail Embedded Wood Reciprocating Blades, Rip Through Nail Embedded Wood With Gently Applied Pressure, Leveraging Patented Variable Tooth Technology, Bite Into Lumber To Make Quick Work Of Teardowns & Demolition Projects, Bi-Metal Construction Gives The Blades Utmost Durability & Perma-Shield Coating Reduces Drag For Smooth Operation In Rugged Applications.