Purpose and compatibility Thread cutting set for creating and repairing NPT pipe threads. Includes three thread moulds (dies) sized 1/2", 3/4", and 1" to match common NPT pipe sizes. Materials and durability Constructed from alloy components with plastic elements where appropriate. Sturdy, durable build designed for repeated use without degrading thread quality. Key benefits Restores or creates standard NPT threads quickly, avoiding replacement of pipe sections. Multi-size set covers several common pipe diameters, reducing the need for multiple tools. Robust alloy parts maintain cutting accuracy and resist wear; plastic parts reduce weight and handling fatigue. Function and performance Produces NPT-compatible threads for reliable sealing with standard fittings. Simple set of dies makes it suitable for on-site repairs and routine maintenance. Works with standard pipe materials sized to 1/2", 3/4", and 1" NPT. Practical use scenarios Home plumbing repair: re-cut damaged NPT threads on water supply lines to restore a leak-free connection without replacing pipe sections. Irrigation and outdoor systems: prepare pipe ends for new fittings or repair threaded joints on sprinkler and irrigation lines. Workshop and maintenance: maintain or retrofit equipment piping, perform routine shop repairs, and prepare threaded ends for assemblies. What’s included Three NPT thread dies: 1/2", 3/4", 1". This set is a practical, durable solution for producing and repairing standard NPT pipe threads in common sizes.