Ideal for mid-sized lathes. A good all around chuck for the beginner or intermediate user to advanced users will find it suitable as a secondary chuck. Compatible with all Nova accessory jaws. Being a keyed chuck it offers the advantage of one-handed adjustment. Features include: Backward compatibility with SuperNova and Nova chuck jaws and inserts, precision hardened, high-tech jaw slides with auto-stop, Jacobs stle chuck key with large easy-grip handle, fitted with standard 50mm jaws, 90mm diameter body, woodworm screw included.