When I got out of high school 27 years ago I worked at Sears auto center and we had to stud tires for customers. We had a stud gun with a hopper mounted on a tower, the hopper spun around and the studs fell into slots in the side and then into a tude that conected to the back of the gun. you put the tip into the hole and when you pulled the trigger the fingers would open up and the stud would go into the hole. we used a little oil on the tip of the gun to make it easier to insert into the hole. The spinning efect would get the studs in the tube the proper direction. Rather a simple opperation when you see it in action. On occassion we would have customers ask us to take studs out after the snow season ( they had to be off your vehicel by april 1 here in PA)we used a screwdriver to pop them out or a long hollow punch the diameter of the stud, just slid it over and pop it out oil here helps also.
