Diablo, 15 Pack, 9'' x 6-12TPI, Nail Embedded Wood Demo Demon Reciprocating Blades, Rip Through Nail-Embedded Wood With Gently Applied Pressure, Leveraging Patented Variable Tooth Technology, Blades Bite Into Lumber To Make Quick Work Of Teardowns & Demolition Projects, Bi-Metal Construction Gives The Blades Utmost Durability & A Perma-Shield Coating Reduces Drag For Smooth Operation In Rugged Applications.