Freud DS0912BW5 9-Inch x 6-12T Demo Demon Diablo Reciprocating Blade, 5-Pack N/A Imported Variable tooth density of 6-12 teeth per inch helps blade Slice through nail-littered lumber 1 in. Demolition body delivers straighter cuts with less vibration Ultra-hardened cutting edge provides utmost durability and longevity 9" Length 6-12 Teeth per Inch (TPI) Bi-Metal Ultra-Hardened cutting edge Non-stick Parma-Shield coating. Oversized demolition blade body Or cutting wood, wood composites and nail embedded wood