Description: Drilling and tapping: This hexagonal shanks drill allows you to drill and tap simultaneously, saving your time and effort. hexes shanks: This is a set of 12 hexes shanks drills bits. The drill tap is designed with spiral grooves and has a better chip cleaning process. Clearly marked: Their specifications from M3 to M10 are clearly marked on the surface, so you can quickly find the right drill bit you need. High hardness: The hexes shanks bit is titanium plated on the surface of high speed steel, high hardness, rust proof, strong and durable. Package includes: A total of 12 in two different standards (metric, inch), with a red cases where you can use taps for a variety of threads. Specification: Material: Steel Size Chart: Metric size: M3 0.5mm, m 4 0.7mm, M5 0.8mm, M6 1mm, M8 1.25mm, M10 1.5mm Inch size: 1/4-20NC, 12-24NC, 10-24NC, 10-32NC, 8-32NC, 6-32NC Package Includes: 12 pieces hexes shanks drills bits Note: Please allow slightly errors due to manual measurement and different monitors.