Precision-Cut Threads for Exact Pipe Work: Engineered with high-quality cutting edges, this NPT tap produces consistently accurate internal threads, ensuring a tight and secure fit for pipe fittings and threaded connections in a variety of materials. Heat Treated for Superior Durability: Tap is fully heat treated and tempered to deliver file-hard threads, improving wear resistance and ensuring longer tool life—even through repeated use in demanding pipe threading tasks. Optimized for Hand Cutting Applications: Designed specifically for use with hand tools, this combo pack offers the control and accuracy needed for manual threading projects, making it ideal for DIYers, plumbers, and professionals alike. National Pipe Thread Standards for Versatile Use: Built to meet National Pipe Thread specifications, this tap is perfect for creating internal threads on a wide range of pipes, fittings, and plumbing components. Includes Matching 7/16” Drill Bit: Set conveniently includes the appropriately sized 7/16” drill bit, providing a complete solution for preparing and threading holes—no need to source additional tools separately.