1、6Pcs in Total: This NPT tap kit is available in various sizes to meet various pipeline thread requirements. It includes 6 pipe sizes of 1in, 3/4in, 1/2in, 3/8in, 1/4in, and 1/8in. The nominal size of the faucet is the size of the pipe fitting to be tapped. 2、Reliable Work: This durable pipe thread tap set is made of carbon steel and aims to clean and efficiently cut female threads. It is an ideal choice for cleaning or re threading blocked or damaged pipelines. 3、Accurate Cutting: These NPT taps use accuracy ground threads with right hand cutting, square end circular shank, and 4 straight grooves. These features together ensure the accuracy and efficiency of pipeline threads. 4、Practical Use: The NPT thread design of this pipeline thread tap set can build a safe and leakage free connection between pipelines or fittings. This makes them reliable in pipeline, automotive, and building applications. 5、With A Storage Box: For convenience, the 6 piece NPT faucet is neatly placed in a smooth plastic casing. This not only protects them from rusting, but also makes them well organized and easy to access when you need thread cutting tools.