Review on Preamer 10 45Mm Metric Titanium Speed by James Naylor

Two existing toolbox openings enlarged large enough to accommodate sockets and power cords. It happened as expected. However, the back of each new hole was not cleanly cut; The end result simulated friction drilling, leaving almost enough material to cut the threads. A simple solution with a grinder. I don't know if it's the fault of the step drill or my own feed as it's the largest of the many step drills I've used. The job is done, the tool is not broken. Maw, it works.