Bob Schmidt teaches us how to screw drywall to studs with a drywall screw gun. A countersink bit is a great option to help you screw drywall studs in. This will fit in a variable speed drill for setting counters and drywall. Use a DeWalt screw gun, which is specifically made to install drywall. It has a clutch driven head with different adjustments on the head for different screws. The gun should be inexpensive and doesn't have a very large motor, so it's perfect for a homeowner. If you just have one project, don't buy the gun since you will only use it once. Use a regular screw gun to help install the screws if only a one time job!