Taylor Luggage Scale
Traveler's pocket weight check
I travel for work, and it’s often with a lot of equipment in heavy Pelican cases. My wife picked this up for me, so I can make sure my baggage meets weight restrictions and not pay extra fees for overweight luggage due to all the new rigorously enforced limitations on airlines.
It’s compact and lightweight, and can pack easily into a bag to come along for the trip and be useful on the way home, too.