RUKO 2-blade spiral step drill, 1 inch, cobalt high speed steel, 101705E, 1 piece

Catalog number: 101705E Features: ● Made of high-quality materials, it allows stable drilling without load or vibration. Applications: ● Workpiece: Steel plate (strength 900N/mm2 or less), brass, aluminum, plastic (up to 4mm) Specifications: ● Step width (mm): 4 ● Number of steps (steps): 9 ● Drilling dimensions (φ): 5/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 ● Surface treatment: Non-coated ● Drilling dimensions: 5/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 ● Shank diameter: 3/8 ● Non-coated Material/Finish: ● Cobalt high speed steel