Each of Osborne's Pricking Chisels is machined to perfection from a solid piece of milled forged steel; you can't get quality better than this, especially for the price! Osborne Pricking Chisels are especially suited for lacing and buckstitching with 1/8" or 5/64" (if you can find it) lace. The angled prongs cut precision perfect slits that ultimately gives your product a symmetrical, ultra-professional look! Size 9 (8 cuts per inch). Length of each cut is 5/64". Osborne tools do not come sharpened. Please see video below on how to sharpen.