High Quality HSS step drill bit with titanium coating for durability, reduced friction, and heat resistance. Easy drilling with dual flute design and surface depth gauges for precision. Long lifespan due to heat-treated high-speed steel construction. Creates precise holes from 5mm to 35mm without needing multiple bits. Ideal for sheet metal, sinks, car repairs, and materials like wood, aluminum, PVC (up to 5mm thick). Features: - Titanium-coated HSS for smooth, fast cuts. - Auto-deburring with minimal pressure. - Clearly marked step sizes. Specs: - Material: High-speed steel - Color: Gold - Sizes: 5-35mm (13 steps) Includes: 1 x Conical Drill Usage Tips: - Recommended speed: 250-400 RPM. - Works best on materials under 25 HRC hardness. - Use water cooling for longer lifespan. Safety: - Wear hand protection. - Not for children.