General description This HSS Duo M4 Bottoming Tap with A002 Drill Bit Set is designed for creating ISO metric M4 threads. It includes a tap and a matching drill bit, making it suitable for various materials such as steel, carbon steel, aluminum, and cast aluminum. The tools are ideal for producing precise internal threads in both blind holes and through holes. Technical specifications Set includes: 1 tap and 1 drill bit Tap type: HSS, uncoated, with straight flutes Drill bit: Spiral flute, TiN coated, suitable for metal and aluminum Thread size: M4 (2-3 times pitch) Recommended hole diameter: approximately 2.5 times the diameter of the tap Compatibility and accessories Compatible with: steel, carbon steel, aluminum, and cast aluminum Includes a suspension hook for easy storage Installation Use the drill bit to create a hole with the appropriate diameter in the material Insert the tap into a suitable tap wrench or handle Turn the tap into the drilled hole to cut the internal threads,