A string trimmer utilizes a cutting line, or string, that rotates quickly to cut foliage. It generally has a long arm attached to the rotating cutting line assembly so that the user can stand straight while working, away from the flying debris.
Most manufacturers make multiple attachments to make the string trimmer more versatile in use. Typically, the attachments are interchangeable on the same model trimmer.
Each string trimmer model has a unique shape and design. The attachment parts from different manufacturers will not fit all string trimmers. Improper, or loose, connection between mismatched attachments and a string trimmer can result in a cutting danger for the user.