- Size & Package Includes: This set features three step drill bits in sizes 4-12mm, 4-20mm, and 4-32mm, catering to various drilling needs. The package also includes an automatic center punch and comes with a durable nylon storage bag for easy transport. - Material & Coating: Crafted from high-speed steel, these drill bits are titanium-coated to minimize friction and enhance cooling during use. This innovative coating allows for effortless cutting through steel, aluminum, copper, plastic, wood, and a variety of metal plates. - Spiral Design: The spiral double blade design ensures faster and smoother cutting. As you drill, the step tool automatically clears burrs from the hole, providing a clean finish. This kit is ideal for working with wood, sheet metal, and steel surfaces. - Enhanced Usability: The included automatic center punch features a spring-loaded mechanism that delivers a reliable, impact-resistant punch for precise marking. Its brass body includes a deeply knurled surface, ensuring a secure grip and preventing slips during operation. - Practical Applications: Perfect for DIY enthusiasts and professionals alike, this drill bit set is great for tasks like creating holes in metal sheets for fabrication projects, drilling precise holes in wood for furniture assembly, and performing detailed work on automotive repairs. This versatile toolset is essential for anyone looking to achieve consistent, high-quality results in their drilling projects.