14pc Universal Jig Blade Assortment High-Alloy and Cobalt Steel - For Cutting Metal Wood PVC and More Essential assortment of tempered and heat-treated high alloy and cobalt steel jig saw blades gets you ready to cut wide variety of materials 14-blade set includes 2 each of 6 TPI (Teeth Per Inch) blades for fast cutting of wood, plastic, PVC, and other non-metal material 8 TPI medium cut and 10 TPI for smooth cuts For cutting aluminum, copper and soft steel set includes 2 each of 14 TPI and 18 TPI medium cut, 24 TPI fine cut and 32 TPI extra fine cut Universal fit for all makes and brands of power jig saws using standard 1/4"-width blade insertion end Outstanding value for any home or professional workshop