Product Description              Speedbor, 15 Piece, Titanium Nitride Coated Pro Drill Bit Set, 1/16" Through 3/8", Lasts Up To 10 Times Longer Than Standard HSS Drill Bits, 140 Degree Split Point For Less Walking & Quicker Starts, Cutting Edge Stays Sharper Longer & Tin Coating Reduces Friction, Application Is For Repetitive Metal Drilling With Portable Or Stationary Drill Presses, Rugged Storage Case With Rubber Over Mold For Added Impact Resistance & Sliding Latch Design Provides Added Security.                 From the Manufacturer              Irwin Industrial Tools 3018009 Drill Bit 15-Piece Tin TurboMax Pro Set. Irwin offers a complete line of Metal Twist Drill Bits, including Black Oxide, Turbo Point, Titanium Nitride and Cobalt Drill Bits.