Du-Bro - 373
This is a 4mm Tap & Drill Set
The DU-BRO Standard and Metric Tap & Drills are designed to take the guesswork out of tapping and drilling for RC building, repairs, and precision hobby work. These taps and drills are sold in matched pairs, ensuring you always have the correct drill for the proper tap size. For builders who want accuracy, simplicity, and dependable results, these sets provide an easy and frustration-free solution.