A press-fit ball plunger is a handy tool to have around the house, and it's easy to install. You'll need a drill, a screwdriver, and a few other tools. First, mark the center of the hole you want to drill. Then, using a drill bit that is slightly smaller than the diameter of the ball plunger, drill a hole at the marked location. Next, insert the ball plunger into the hole. Finally, use a screwdriver to tighten the set screw on the side of the plunger. That's it! Your spring loaded plunger is now installed and ready to use.