Nova jaw sets add even greater versatility to the Nova Midi, SuperNova2 and Nova Titan chucks. Each set is precision machined from a high quality solid steel billet and comes with an easy to read instruction manual. Spigot Jaw Sets are heavy section jaws with a powerful grip for spigot (tenon) turning. With 30mm (1-1/8") depth and a special serrated tooth form, these jaws really hang on to your workpiece. For work where a long overhang is needed or hollowing into end grain, these jaws provide superior gripping power.