You are going to find where you need to place the belt hole and place the screwdriver right on top of it. Bang on the hammer on top of the screwdriver until the screwdriver head penetrates the belt material. You may have to flip over the belt and do this on the backside to get a good hole.
Stick the belt clasp thing (whatever its called) in the hole and move it around to stretch it out a bit to make it usable.
And voila! You fixed a belt! I would recommend only using this technique on leather or faux leather type belts. Other techniques may need to be used for fabric belts, belts made with glitter etc...But this works great for what I needed! Let me know if you have any questions and comment below if you tried this!