Here we have a LeBlond No5 4-jaw lathe chuck. Seems to be in great shape. The jaw screws have 1/2 square sockets. This one does not have an adapter plate on the back (unlike the other one I have listed). The diameter of the space for the adapter plate is 5 inches. Please provide a REAL address. Heavy items will be packaged using solid styrofoam block. It is very rare for the items I pack to be broken, as my feedback should attest. Especially on those large items. I can be flexible with scheduling – just ask!