The optional Vari-Grind Attachment is used with the Wolverine System to make fingernail grinds on spindle gouges and side grinds on bowl gouges. The head of the jig is articulated so a wide range of different grinds can be accomplished with just a little practice. The Vari-Grind is used with the V-Arm Attachment that comes with the basic sharpening system. The Vari-Grind can also be used by itself if the customer wants to make his own base to support it. This Vari-Grind Jig comes equipped with a nylon capped bearing which secures the gouge in the jig. This jig does NOT require the Vari Grind Upgrade kit.