The conversion kit adds about 50 to 150 foot pounds in reverse and about 75 foot pounds in forward drive position. The real and actual torque output numbers vary on this due to the nature of: existing tool parts fitment, all internal air tool leakage, operating (regulated) air pressure to the tool, your air hose system's internal condition, your supply hose ID and the properly maintained distance (steel piping diameter and ID) from the compressor air receiver. The reason why impact tools have higher torque ratings in reverse than forward is explained thusly. It takes more torque (higher numbers and heavier impacts per second) to stretch a steel fastener and the threads which hold it to the limit of tensile strength than it does to release (in reverse position) the stress of the tensile stress on a fastener.
The package shipping weight is 2 pounds with Priority Air Mail. International orders are shipped from the eBay Global Shipping Center for extra confiscatory monies (that I do not benefit from financially).