This adjustable V Gouge leatherworking tool, cuts perfect 3mm (1/8") grooves anywhere on the leather. The depth of the V gouge can be adjusted in seconds by turning the knurled collar. Ideal for gouging fold lines in firmer thicker leather when your leather craft project requires a 90 degree bend like on a briefcase or messenger bag. Also great for grooves in thick leather when making stitch lines and more. This leather craft tool has a nice contoured wood handle.