Attaches to all wheels when used with a 12" wheel-head (except the M1). This space-saving rack will allow you variable speed milling and grinding. The rack accommodates jars from 3-1/2" to 9" diameter up to 10" long. Made of heavy-duty cast iron, the unique folding design lets you use your SHIMPO wheel for throwing without detaching the rack. Special order item. Allow 6-12 weeks for delivery.