1.Titanium Coating for Durability The Step Drill Bit for Wood features a durable titanium coating that ensures durability and sharpness, making it perfect for precise drill holes in wood, metal or other materials with ease. 2.Serrated edge for smooth drilling: With serrated drill bits, these step drill bits ensure smooth and effortless drilling, preventing the material from splintering or getting stuck, making them ideal for clean, accurate cuts in sheet metal and wood. 3.Versatile fit for most drills: The step drill bits for hole drilling are designed to fit most electric drills, ensuring compatibility and ease of use for both professional and applications, providing you with a versatile tool for various projects. 4.Complete set for various sizes: This set of 6 step drill bits a range of sizes, allowing you to tackle different drilling tasks with precision, whether you're working with wood, metal, or other materials.