Premium Material: Made of high-quality steel for long life. Cobalt coating for even and cleaner cutting. Titanium coating for reduced friction and cool operation. Tip EFFICIENT: The two-wave design provides faster and more even cutting. Holes are automatically deburred when drilling. ELEGANT DESIGN: The large bit has a tri-point shank, while the small bits have a tri-point shank to prevent slippage in the chuck. PORTABLE: Padded aluminum case for easy carrying and storage.