Handy set case of Impact-rated HMT Versadrive Step drills with Spiral flute design for fast, smooth drilling with a rotary drill or impact wrench. VersaDrive Step Drills have a reinforced hex shank with increased strength for greater feed rates. The non-slip shank design provides a secure hold with all standard drill chucks, preventing slippage. VersaDrive Step Drill Bits have a heavy-duty, 135-degree split point geometry as standard, providing extremely accurate drill-point starting on a wide range of materials.