Large Step Drill Bit - Constructed with 12 drill diameter steps: 6mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm. Unique step design allows for multiple hole sizes without changing bits or repositioning. Material - Made from HSS 4241 high-speed steel with a titanium-coated surface for enhanced durability. Resists rust, wear, and heat, providing a longer service life. Design - Features a 135-degree split point tip and a 2-flute, double-edged cutting design for faster, smoother cutting, improved chip removal, and stable operation. The three-sided shank ensures a secure fit in power tool chucks to prevent slipping. Built-in depth gauges allow for precise drilling control. Application - Suitable for use on materials including metal, wood, aluminum alloys, plastic sheets, and insulation boards. Recommended for water-cooled drilling on materials with hardness below 25 HRC. What You Get - 1 x Step Drill Bit. Recommended operating speed: 250-400 RPM. Note: Measurements are manually taken and may vary by 1-3 cm. Color may slightly differ due to lighting and screen display variations. Please refer to the actual product received.