We called ours a Hydrosion Auger but don't know if that is correct or not since I got it from another plumber.
We used 7' sections of 1" black pipe and have drilled out as much as 50' or so from a basement to the hole dug at the water meter pit.
I had one employee that was very good at hitting the hole within 6" of where it needed to be and another that drilled a water line under a four lane street once with no problems.
Ours does wash the mud back out at you so a helper is needed to constantly clean it up.
