The Stronghold chuck with #2 jaws weighs 6 lb. 12¼ oz. The key and T-handle hex wrench together weigh 11⅞ oz. This gives a total weight of 7 lb. 8⅛ oz. My chuck has an insert for a 1¼ X 8 lathe spindle. If a 1 X 8 insert was used instead, that would add a few ounces (less metal removed for a 1" hole compared to a 1¼" hole). Throw in the weight of the cardboard box, packing, and instruction pamphlet and you have a few more ounces. Due to the oblateness of the Earth at northern latitudes, things would weigh slightly more in Canada. Compound that with the fact that our northern brethren are metric and it becomes apparent that all hope is lost for an easy answer to the question.