Hopper I too remember the drifts on every machine, lathes and drills. Very handy when doing multiple drilling operations on components when one had to change drills a lot.
We also used ours to "bang in" anyone who was late for work, as the offender walked up the machine shop everyone would bang on the machine drip trays with their drifts, and the sound of a hundred folk doing this meant the latecomer did not go unnoticed.
These were the days when if one clocked in 3 minutes after start time, one lost a quarter of an hours pay, but was still expected to start work as soon as they got to their machine.
Happy days, I think.
Chris Gunn