4-in-1 Leather Craft Pro Stitching Groover Creaser Set Gruber blade, drawing modeler, with hex wrench Corresponding to the minimum 1mm width, maximum width is 12mm An edge stitching groover for giving hand stitched or lock stitched leather a recessed look, making the surface of the project smooth, A free hand groover for carving or creating a recess for stitching, An edge creaser for aesthetically attractive and stronger edges,