Trimmers make it easy to keep a neat beard. A  trimmer allows you to touch up and shape your beard once or twice a week instead of having to shave every day. Most beard trimmers use snap-on plastic combs that protect the blades. Simply snap on the comb that meets your desired beard length and run the trimmer along your jaw. Think of this action as similar to mowing a lawn. If your trimmer comes with lots of size combs, generally start with one that’s the maximum length you want your beard to be, then use a shorter version to cut in further and detail your trim. If you have a detailer, you can use this device to touch up the lines of your beard and clean up the edges.