In this video tutorial, viewers learn how to choose a drill. There are 3 types of drills: cordless drills, electric drills and rotary hammer drills. cordless drills run on batteries and have a hammer setting. cordless drills are able to drill into concrete with mason drill bits. Electric drills last much more longer than cordless drills, but are limited by the extension reach. Rotary hammer drills are only used to drill into concrete. Some drills require a chuck key. Others have a key-less chuck that tightens and secures the drill bit. This video will benefit those viewers who are interested in the construction trades or need to use a drill, and would like to learn about different drills and each of it's purposes.