Kboisha 6-Piece Npt Pipe Tap Set, Carbon Steel Npt Thread Forming Tap, And 1" Made from durable carbon steel to create precise internal threads on metal, plastic, wood Designed to meet National Pipe Taper standards for leak-proof, vibration resistant seals Set includes 6 essential sizes from 1/8"-3/4" for wide range of plumbing, gas applications Round shank square end combine for efficient chip collection; Right-hand cutting enables easy use Comes with carrying case to keep taps protected, organized for convenient storage and transport