Abstract: A guide is provided for a string trimmer that permits it to be positioned closely adjacent to or in a variety of positions further from borders and similar objects. The guide is attachable to the guard of the trimmer and is composed of two slideably adjustable members that permit its length to be varied to provide different spacings from borders and objects. The guide includes an obtuse angle formed in its length to permit it to be used vertically as an edger and vary the spacings from borders when it is used as a horizontal trimmer. An elliptical head is provided on the outer end of the plastic guide to facilitate fine spacing adjustments and enable sliding movement along a variety of surfaces such as pavements, stones and gravel.