Drill Fast, Accurate Holes Through Materials Up to 1″ Inch Depth – Drill Steel, Stainless Steel, And Other Tough Materials – Ultra-Sharp Tungsten Carbide Teeth Cut Quick, Smooth, Perfectly Round Holes – Flatted Shank For Use In Power Drills And Drill Presses – Safety Collar Stop Prevents Over-Penetration For Safer Operation – Spring Loaded Pilot Drill Ejects Metal Plug Quickly For Increased Productivity – Outperform Bi-Metal Hole Saws – Ideal Portable Tool For Electricians, HVAC, Sheet Metal Trades, And Contractors