Features This spiral screw tap drill set is multi functional, suitable for drilling, tapping and cutting soft metals, aluminum plates, iron, etc. This spiral screw tap drill bit set uses high quality high speed steel, high hardness, rustless, sturdy and durable. Time saving, one time processing of drilling and tapping, greatly saving processing steps and time costs, and improving work efficiency. This hex shank drill and tap kit is blue coating, both beautiful and practical for working use. Please note that the steel materials are not suitable for this set because it can be easy to break. Specification: Item Type: Spiral Tap Drill Bit Kit Material: High Speed Steel Purpose: 3 in 1 (Punching --- Tapping --- Deburring) Range Of Application: Suitable for Processing Soft Metals (Such as Aluminum Alloys, Zinc Alloys, Tin Alloys), Thin Wood Boards, And Plastics With A Thickness Of Less Than 5 mm/0.2in Specifications: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 SpecificationsPitch :in (Approx.)Blade's Length:in (Approx.)Handle Length :in (Approx.)Total Length :in(Approx.)M30.021.260.872.13 M40.031.260.872.13 M50.031.340.872.20M60.041.380.872.24M80.051.420.872.28M100.061.420.872.28 Package List: 6 x Tap Bit Note: Steel materials are not suitable and easy to break. Package List 6 x Tap Bit