Spyder 2-1/2-in Carbide-Tipped Non-Arbored Hole SawUp to 50x more cuts than bi metal Up to 10x faster than standard hole saws More teeth to aggressively cut faster Cuts through metal Specifically designed to aggressively cut through steel, stainless steel, cast iron, plastic and wood with nails Drops out with a push of a button Cut at an angle Enlarge existing holes Features Brand Model Compatibility Irwin Type Hole saw Blade Material Carbide tipped Case Type N A (no case) Set Individual Individual