When ordinary tools can not get to much sufficient or work quick enough, Mighty Probe is the device for the job

https://xeon-wiki.win/index.php/Septic_Probe_Rod_Essential:_Just_How_to_Find_a_Septic_System_Effectively

When ordinary tools can not reach far sufficient or work quick enough, Mighty Probe is the tool for the task, providing you the depth, speed, and control needed to get it done.