RUKO 2-blade spiral step drill 1/2 cobalt high speed steel 101701E 1 piece

Catalogue number: 101701E 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): 6 ● Drilling dimensions (φ): 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 ● Surface treatment: Non-coated ● Drilling dimensions: 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 ● Shank diameter: 1/4 ● Non-coated Material/Finish: ● Cobalt high speed steel