Professional-Quality Adjustable V-Gouge Tool for Leathercraft Folds, Box Corners - Lifetime Warranty
To use the V-gouger, place leather piece on hard, flat surface.  Turn knob counter-clockwise to adjust blade depth down - it helps to put pressure on blade with finger to get accurate depth level.  Use a scrap piece of leather of similar thickness as workpiece to make sure blade won't cut completlely through leather. When V-gouger is placed on leather, the weight of the tool will force blade to maximum depth level set.  Turn knob clockwise to reduce depth or to retract blade into body for safe storage. JENSEN-and-JENSEN tools are designed to make any leathercraft project easier and with better, professional results.  They are the same ones we use every day in our leather goods production and have been designed and built to last for years and years - but without having the store-brand price. We stand behind this tool with a lifetime warranty against product defect.