This is flush Fit Drill Steel. No couplings

 This is drill steel threads " NOT PIPE THREADS"!

 This drill steel threads together easy and unthreads easy with real drill steel threads . Unlike the other drill steel or users who wish to try using Pipe Threads.

 Pipe Threads are meant to stay together .. Not to be removed and tightend repetitively .

 Pipe Threads are meant to stay together.  Working with drill steel with Pipe threads can prove to be difficult and frustrating.   

 This Portadrillmini Drill Steel weighs 20 lbs each.  This will add extra weight on top of your drill bit with every stick of drill steel added.