RUKO 2-blade spiral step drill 7/8 cobalt high speed steel 101704E 1 piece

Catalog number: 101704E 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): 12 ●Drilling dimensions (φ): 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8 ●Surface treatment: Non-coated ●Drilling dimensions: 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8 ●Shank diameter: 3/8 ●Non-coated Material/Finish: ●Cobalt high speed steel