Spyder Bore blades will fit all reciprocating saws. Blades cut wood, pipe sheet metal, plastic, nails, and other hard materials. Double-edged, 1.23mm thick, bi-metal steel blade allows multi-directional cuts without flipping saw over. Additional reversed tooth configuration on top of the blade enables cuts on both the push and pull motion for more efficient cuts. Rounded tip with teeth allows plunge cuts, thus eliminating the need for pilot holes. Set includes 1 each: 1" to 10" 7/7 tpi (teeth per inch) (wood), 1" to 8" 7/10 tpi (wood/general), 1" to 6" 10/14 tpi (general/metal).