Hold the Stop & Lock luggage scale by the blackhand grip so that the dial and the luggage hook hang freely below it.
Twist the knob where the hook enters the scale by hand until the scale reads 0. This will set the tare, or base weight of the scale before adding items.
Slide the carrying handle of your luggage over the hook of the Stop & Lock luggage scale.
Hold the Stop & Lock luggage scale at a fixed height without moving it up or down. This will allow the scale to accurately read the luggage's weight.
Read the dial by noting which weight it points to. This is how much the piece of luggage weighs.
Compare the weight against the airline's weight restrictions, and remove items from the luggage if necessary.