This high quality Prosport drill and 1/8 Npt-27 tap combination set enables the installer to drill/thread a 1/8 Npt-27 thread for the fitment of aftermarket 1/8 Npt gauge sensors to a vehicle engine etc.
 
Matching drill & 1/8-27 Npt combo set
Precision tools for professional finish
Very easy to use
Allows easy fitment of aftermarket 1/8-27 Npt gauge sensors (where space/material thickness permits)
Suits all aftermarket 1/8-27 Npt gauge sensors