A drill (on the left above) can be used to either bore holes in something, or it can turn screws, bolts, or other fasteners into materials if you use a driver bit.

An impact driver (on the right) is not generally used for drilling, and is just used to drive screws and other fasteners into materials (hence the name “driver”).

If you’re drilling, hold your screw or bolt up to the drill bits you have to find the best fit. Your bit should be slightly smaller than the screw you’re using.

If you’re screwing something in, you’ll want to pick a driver bit that matches the head of your screw or bolt. Some screws come with a matching driver bit to make the job really easy!