The Vevor 40-piece tap and die set is designed for cutting and repairing internal and external threads across a range of common metric sizes from M3 to M12, plus 1/8-27 NPT. Built for durability, the set features hardened bearing steel construction with precision CNC machining, heat treatment, and double polishing for smooth, accurate threading performance. It includes a full selection of taps, dies, and essential accessories to help with a variety of maintenance, repair, and workshop tasks. A portable storage case keeps every component organized and protected during transport and storage.