Ideal chuck for those with larger lathes with upto 508mm swing. A brilliant all-round chuck for the majority of users, from beginners to professionals. Compatible with all Nova accessory jaws. Being a keyed chuck it offers the ease of one hand adjustment. Features include: Fully sealed backing plate, unique indexing fuction built into the backing plate, fully compatible with SuperNova and Nova chuck sets, precision hardened, high tech jaw slides with auto stop, ball nose Allen key with large easy to grip handle, fitted with standard 50mm jaws, 100mm body and includes the Nova woodworm screw.