There are many different types of hand retractable spring plunger on the market, but they all work in essentially the same way. To use one correctly, start by unscrewing the ball spring plunger from the body of the tool. Next, insert the ball spring plunger into the hole that you want to clear. Finally, screw the ball spring plunger back into the body of the tool and pull the trigger to fire it. The ball spring plunger will do all of the work for you, clearing the hole quickly and effectively. Just be sure to aim it carefully to avoid damaging any nearby surfaces.