NOVA JSPIN Pin Chuck Accessory Jaw Set Special NOVA dovetail profile, designed to maximum strength and holding in wood turning, without crushing wood fibers All NOVA Chuck accessory jaws are designed to hold in the expansion and contraction modes Same jaw fixing system across all NOVA Chuck models - total system interchangeability Longer jaws allow for a very powerful spigot grip for smaller work such as lace bobbins Acts like a pin chuck, expanding into a pre-bored hole. Perfect for free form edge bowls