20pc Tap and Die Set 8 Metric Tap and Die Sizes : M3 x 0.4 | 4 x 0.7 | 5 x 0.8 | 6 x 1.0 | 7 x 1.0 | 8 x 1.25 | 12 x 1.75mm Die 1/8in. NPT / Tap 1/8in. NPT Bar Type Tap Wrench and Die Holder Suitable for Cleaning and Re-threading Mild Steel or Aluminium