Features: - The drill bit has reaming and chamfering functions, improving processing efficiency. The secondary cutting angle is available in 90 or 180 degrees. - Suitable for drilling multiple holes and can be used for applications such as installing hex nuts, reducing the need for multiple tools. - The countersink head is made of HSS (High-Speed Steel), capable of machining metal and non-metal materials with hardness up to 30 HRC, including cast iron, tool steel, copper, aluminum, alloy steel, iron, and die steel. - Due to manufacturing variations, total length may slightly vary but does not affect performance. Specifications: - Product Name: Spiral Step Drill Bit - Material: HSS - Color: Black - Angle Options: 90°, 180° - Size Options: M3, M4, M5, M6, M8, M10, M12 - Suitable for: Drilling, Chamfering - Quantity: 1 Piece Package Contents: - 1 × Spiral Step Drill Bit Notes: - The actual color may vary slightly from the images due to monitor brightness or lighting conditions. - Please allow slight variation due to manual measurement.