3PCS HSS Nitride Black Step Drill Bits, 31 Step Sizes Total High Speed Steel Step Bits for Stainless Steel, Metal, Wood, Plastic with Case

3PCS HSS Titanium Step Drill Bits

• 【Premium Step Drill Set】Engineered from industrial high-speed steel with black nitride coating, this 3-piece set covers 31 essential sizes for versatile drilling applications. Designed for professionals and DIYers alike, it delivers precision and durability in every operation. The optimized step design enables smooth hole enlargement without bit changes for maximum efficiency.
• 【Superior Performance】The self-centering tip ensures accurate starts while the spiral flutes provide clean, burr-free cuts in various materials. Black nitride coating triples tool life by enhancing surface hardness and heat resistance. Each drill maintains sharp cutting edges through extended use for consistent results.
• 【Multi-Purpose Application】Perfect for stainless steel, aluminum and sheet metal fabrication with effortless drilling performance. Ideal for electrical installations, plumbing projects and general construction tasks. Excels in automotive repairs, HVAC maintenance and industrial manufacturing applications.
• 【Complete Size Range】Features 31 progressive sizes from 1/8" to 7/8" (3-22mm) across three specialized drills. Includes all standard ANSI sizes for perfect compatibility with fasteners and fittings. Precision-ground steps maintain tight tolerances for accurate hole diameters every time.
• 【Buy with Confidence】FilwW promise to provide you with a satisfactory shopping experience. If you need any assistance or have any questions during use, please feel free to contact us. Our team will respond within 24 hours of your inquiry and work diligently to resolve any issues, ensuring you receive the best service experience.