[Various Sizes]: Professional HSS step drill for precise drilling with diameters ranging from 5 mm to 35 mm. Capable of machining large holes in a single operation without the need to change drill bits or reposition holes. [High-Quality Material]: Made of high-quality HSS steel with a titanium coating to reduce friction and heat. Provides reliable performance and durability when drilling plastic, wood, aluminum, copper, stainless steel, and various sheet metals. [Easy to Use]: Double-edged design enables faster and smoother drilling with minimal resistance. Offers excellent speed and accuracy. [Clear Size Markings]: Clearly marked step sizes allow for accurate and precise drilling. Use with water during operation to help extend tool life. [Secure Grip]: Non-slip surface design ensures stable handling and accurate positioning to prevent deviation. Material: HSS Steel Color: Silver + Gold Package Contents: 1 x Step Drill, 1 x Twist Drill, 1 x Center Punch Note: The package includes only the items listed above. Other products are not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.