6PC 1/4" 3/8" 1/2" STEEL TAP & DIE TOOL THREADER THREAD KIT PIPE THREADING#0025/95 The 1/2" die and tap is particularly useful for cleaning out the threads on electrical connectors and boxes. This pipe tap and die set comes in a wooden storage case that fits nicely in a tool box. Cuts and renews external and internal threads to for standard pipe sizes Heat treated and hardened Precision ground heat treated alloy steel Comes in handy wooden box for easy storage Comes with three taps and three dies and one wooden storage box INCLUDES SIZES: 1/4" 18 NPT 3/8" 18 NPT 1/2" 14 NPT