Gaosi Tools Leathercraft Adjustable Stitching Groover Crease Edge Skiving Leather Tool with Aluminum Handle. (Silver) Material:aluminum and Metal,Perfect union of aluminum handle and stanless steel groove. This groover is easy to adjust. Just loosen the chuck, adjust the blade, and retighten. No tools are needed. Professional grade tool for cutting hand stitching grooves Adjustable leather edge stitching tool, use to groove the edges of your leatherwork. Multi-functions all in one (drawing sideline, pulling ditch,digging trench)