Pipe Wrench - Milwaukee Cheater

The Milwaukee Cheater Pipe Wrench is an adjustable pipe wrench.
For tight spaces the handle is 10 inches long. If you need more leverage you can add the short cheater bar to get the leverage of an 18 inch pipe wrench. For large projects, the long cheater bar give you the leverage of a 24 inch pipe wrench.
The handle is rounded for a good grip and comfort.
The jaw allows a 2 1/2 grip range.
The dual coil spring design, located in the body of the wrench, maximizes durability and longer tool life. Lanyard holes are integrated into the handles, compatible with safety requirements on the jobsite.

[Chrominance]

What kind of threads are on the end of the cheater bar? Are they NPT?