Catalog number: LBH521SPN Features: ●The spiral groove makes the rake angle sharper than the straight groove, significantly improving the sharpness. ●Since it uses cobalt high-speed steel, it has excellent wear resistance and heat resistance, and the sharpness lasts for a long time. ●One tool can be used for various processing such as drilling, pilot hole enlargement, hole correction and chamfering. ●It can be used for various applications and materials such as thin steel plates, pilot holes for wood screws, and curved surfaces of pipes. ●The tip bites well, so no center punch is required. Applications: ●Workpiece: Steel plate, wood, plastic, etc. (Do not use on heat-treated metal plates.) ●Ideal for drilling, pilot hole enlargement, correction and chamfering. ●Maximum drilling plate thickness (mm): Steel plate 2.0, Stainless steel 1.2, Wood/Plastic: 2.0 Specifications: ●Step width (mm): 4.0 ●Number of steps (steps): 9 ●Shank shape: 6.35mm hexagonal shaft (with ball groove) ●Shank diameter (mm): 6.35 ●Drilling dimensions (φ): 5, 7, 9, 11, 13, 15, 17, 19, 21 ●Total length (mm): 80 ●Surface treatment: Non-coated ●Non-coated Material/Finish: ●Cobalt high speed steel Set contents/Accessories: ●None
