This 7-piece Combined Drill and Tap Set features a 1/4" Hex Shank and includes six combination drills and taps ranging from M3 x 0.5 to M10 x 1.5. Designed for drilling, de-burring, and threading, it comes with a 1/4" Hex Magnetic Bit Holder. The set is made from HSS 6542 material, offering multiple applications in one operation: drilling the core hole, cutting the thread, flash removal, and sinking.