Sumnacon Leathercraft Groove Gouge DIY Tool - Adjustable Leather Edge Stitching Groover Edges Filter with Wooden Handle Professional grade tool for cutting hand stitching grooves for your leatherwork Easy to adjust, loosen the chuck, adjust the blade, and retighten Groove width adjustable, rotate the controller to adjust the groove width according to your requirement Made of steel with wooden handle Length: approx. 5.3 inch. Groove Size: 1mm