I would add a set screw to lock the chuck onto the lathe spindle, as has been mentioned, since this is a screw-on mount chuck. Also, the 1/4" plug socket needed to adjust jaws is uncommon. If the wrench is lost (or, not included in the shipment, as mine was) a 1/4 drive deep socket, used in reverse, with a 5/16 or so allen wrench used in outer end can work.