Hi, I have a steel ring beam 203mm x 203mm x 46kg, I need to drill through the steel which is 11mm thick. The holes need to be 20 mm in diameter   The problem is that it is very awkward to get to where the holes need to be drilled and a Mag Drill will not get it the correct position for the holes   Has anyone used a standard or heavy duty drill to achieve something similar, if so what drill did you use and what drill bits were used.   Thanks in advance