This 110mm by 90mm tool rest slides on to the arm of the universal jig holder to provide a large and firm supporting platform when sharpening your tools. The locking system which increases the locking force by over 200% allows you to leave the jig set up and make repeated grinds. This jig is used for the sharpening of woodturning scrapers, chisels, cabinet scrapers and any fine edge tool with a flat surface. ©