Feature:1. PACKAGE INCLUDE: NPT tap set contain 1/827, 1/418, 3/818, 1/214, 3/414, 111.5 taps, each in a separate plastic box, easy for you to store and carry to use2. EXCELLENT HSS: This durable pipe thread tap set is made of excellent high speed steel and is designed to cut female threads cleanly and efficiently. Ideal for cleaning or re threading blocked or damaged pipes3. WIDE APPLICATION: Uncoated HSS tap tools have only a base and do not require any additional treatment or coating for a wide range of applications4. CHIP COLLECTION: Straight groove tools allow chips to be collected in the groove during cutting and are ideal for most applications in shallow cutting5. ACCURATE AND EFFECTIVE: These NPT taps feature right hand cut accurate grinding threads, square ended round shank, with four straight grooves, which together ensure accuracy and efficiency in pipe threadingSpecification:Item Type: NPT Pipe Tap SetMaterial: 6542 High speed steelSize(NPT): 1/8-27, 1/4-18, 3/8-18, 1/2-14, 3/4-14, 1-11.5.Package List:1 x 1/8-27 NPT Pipe Tap1 x 1/4-18 NPT Pipe Tap1 x 3/8-18 NPT Pipe Tap1 x 1/2-14 NPT Pipe Tap1 x 3/4-14 NPT Pipe Tap1 x 1-11.5 NPT Pipe Tap6 x Storage Box