These sets include multiple grooving tools. The tools in each set may have a variety of shank sizes to match different lathe setups, or they may have different cutting ends to create grooves in a range of widths and depths. Grooving tools are used with lathes to cut channels on the end of a workpiece (face grooving) or into an existing bore (internal grooving). They have a cutting edge at one or both ends of the tool and are held stationary on the lathe while the workpiece is rotated against their cutting edge.