Leather groovers are tools used to cut grooves into leather. Grooves can be used just for marking lines. For example, pulling the groover with light pressure will cut a light line into the leather. Grooves can also be cut deeper, creating a channel in which stitching can be set. Since the final stitched will rest within the groove, below the surface of the leather, they will be less susceptible to abrasions and tearing.
One can also place grooves where they want to create a fold line in the leather material. Or, cut grooves into leather for decorative purposes. For example, adding a groove along either side of a belt. Groovers are generally available as stitching or scratch groovers, each with its potential benefits.