RUKO 2-blade spiral step drill 1/2 cobalt high speed steel 101702E 1 piece

Catalog number: 101702E Features: ●High-quality materials are used, allowing for stable drilling without load or vibration. Uses: ●Cutting materials: Steel plate (strength 900N/mm2 or less), brass, aluminum, plastic (up to 4mm) Specifications: ●Step width (mm): 4 ●Number of steps (steps): 13 ●Drilling dimensions (φ): 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 19/32, 3/16, 15/32, 1/2 ●Surface treatment: Non-coated ●Drilling dimensions: 1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 19/32, 3/16, 15/32, 1/2 ●Shank diameter: 1/4 ●Non-coated Material/Finish: ●Cobalt high speed steel