- Package Includes: This Step Drill Bits Set features three precision sizes (4-12mm, 4-20mm, 4-32mm), perfect for metal drilling tasks. It comes with a portable fabric storage bag for easy organization, making it ideal for job sites, workshops, and DIY projects. - Premium Material: Crafted from titanium-coated high-speed steel (HSS), these drill bits excel in durability and performance. They provide faster and smoother drilling through hard steel, aluminum, copper, and stainless steel, resisting wear and maintaining sharpness over time. - Easy to Use: With a hex shank design, these bits are compatible with most drills and drill chucks, eliminating the need for additional adapters. They serve as excellent hole cutter drill bits, suitable for both DIY beginners and experienced professionals in plumbing and metalwork. - Designed for Precision: These step cone drill bits create precise holes quickly, minimizing material waste. They are ideal for drilling through sheet metal, stainless steel, and other tough materials, making them perfect for precision metal fabrication tasks. - Use Scenarios: - Ideal for creating clean holes in metal sheets for plumbing installations. - Perfect for DIY enthusiasts working on home improvement projects that require drilling into metal or hard surfaces. - Essential for professionals engaged in metal fabrication or repair work requiring accurate hole placement.