The 25mm Jaw Set substitutes for the standard 50mm jaws for use on small work with 3/8″-1-1/4″ spigots, as a type of pin chuck with 1″ capacity, for expanding dovetail work on bowls up to 6″ dia. and for 1/2″-1″ square blanks. •Special NOVA dovetail profile, designed to maximum strength and holding in wood turning, without crushing wood fibres. •All NOVA Chuck accessory jaws are designed to hold in the expansion and contraction modes •Same jaw fixing system across all Standard NOVA Chuck models (except Quick Change) – giving you maximum system interchangeability and flexibility. •Perfect for small bowls and unsupported spigot work. CHUCK SHOWN FOR DISPLAY PURPOSES ONLY. CHUCK NOT INCLUDED.