Do you want to both trim large surfaces and create details in your hair, beard, or body hair? You can do this with the small head of a precision trimmer. With this small head, you can easily create neat lines and shape your sideburns and mustache. In addition to separate precision trimmers, you can also choose a trimmer with a slide-out or collapsible precision trimmer. Other devices have a separate precision trimmer attachment, which you can click onto your trimmer.