- Type: Tap Drill Bit - Material: High Speed Steel - Shank: 1/4" hex shank - DIY Supplies: Metalworking - Weight: 80G - Size: 1/8" (3.175mm), 5/32" (3.97mm), 3/16" (4.76mm), 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.53mm) - All in one operation: complete hole drilling, tapping, deburring and countersinking in a single step with a power drill, saving labor and time. - Suitable for soft metals: effective tapping for aluminum plates with thickness around 3 to 4 mm. - Efficient and reliable: opens a hole, forms the thread, and chamfers the edge in one pass; reduces tool changes and handling. - Durable construction: High Speed Steel with a 1/4" hex shank delivers consistent performance in metalworking tasks. - Use scenario 1: assembling aluminum brackets to a frame, where you need to drill and tap holes in soft metal and finish with a clean chamfer in one operation. - Use scenario 2: fabricating an aluminum enclosure or chassis, enabling quick drilling, tapping and deburring of mounting holes without multiple tools. - Use scenario 3: general DIY metalworking projects on aluminum plates up to 4 mm thick, such as mounting hardware, brackets, or Jigs where fast threaded holes are required.