Only NOVA Chucks give you the same jaw fixing system and same insert/adaptor system across all chuck models.

This means all accessory jaws in the range fit all the chucks in the range, including older chuck models*, giving you the ultimate flexibility. In buying a NOVA chuck, you can be confident that whether you want to move up or down the range, any accessories you have invested in will Fit.

NOVA chucks have been especially designed so the jaws will cut into the wood, grip firmly in the contraction mode and provide high tear out strength.

Some chucks use an engineering jaw profile (designed to hold a hard material like steel) or rounded profiles, which just crush the wood fibres without digging in and holding securely.