Pipe thread cutting set for creating and repairing NPT threads in common pipe sizes. Designed to provide accurate, repeatable threads and a durable fit for plumbing and maintenance work. Key benefits Ready for common NPT pipe sizes: includes three thread dies sized 1/2, 3/4 and 1 to cover typical plumbing and service needs. NPT thread standard: cuts National Pipe Thread (NPT) threads that match standard fittings and connectors. Built to last: constructed from alloy and plastic for a balance of cutting strength and durable handling. Saves time and effort: having three die sizes in one set reduces the need to swap tools or source separate dies. What it does Cuts or repairs tapered NPT threads on pipes sized 1/2", 3/4" and 1". Produces standardized threads for reliable sealing with NPT fittings. Suitable for on-site repairs and routine maintenance where NPT compatibility is required. Materials and performance Dies and cutting elements: alloy for durability and repeated use. Housing/handles/components: plastic where appropriate for lightweight handling. Performance is optimized for creating NPT threads at the included sizes; ensure you select the correct die for your pipe size. Typical applications Home plumbing repair: restore or re-cut NPT threads on water supply pipes or fittings to stop leaks and ensure secure connections. Installation work: prepare pipe ends with standard NPT threads when fitting valves, couplings, or threaded adapters. Maintenance and service: on-site thread repair and re-threading for HVAC, irrigation, or general piping systems that use NPT connections. Usage notes Match the die size to the pipe nominal size (1/2, 3/4, or 1) and confirm NPT is the required thread standard for your fittings. Follow standard safety and machining practices for cutting threads, including proper clamping, lubrication, and cleaning of chips. Included Three thread dies: 1/2, 3/4, 1 (NPT) Constructed of plastic and alloy; sturdy and durable This set is a straightforward solution when you need accurate NPT threads in the three most commonly used pipe sizes.