External Coolant Flow Tap Adapter.
CWE2K/WE2K Sealed Coolant Tap Adapter (External) | 2-1/4 in.
MRK#1 Straight-Shank Tap Holder (Coolant Through) | 1 in.
MRK#2 Straight-Shank Tap Holder (Coolant Through) | 1 in.
MRK#3 Straight-Shank Tap Holder (Coolant Through) | 1-1/2 in.