Gaosi Tools Stainless Carving Knife with Blade, Adjustable Swivel Leather Tools Rotating.best Quality for Leathercraft DIY Material: Stainless Steel,Includes 9mm straight blade and bearings Adjustable swivel knife for leatherworking,Suitable for the professions and amateurs It features an edge beveler, an adjustable "u" gouge, and an adjustable groover You can adjust the length, the angle of suitable size, to fit your need It is a must tool for leathercraft especially for DIY leather to create beautiful work