Luggage Belt has a built in luggage scale so you know before you get to the airline check in counter how much your bag weighs. Don't pay overweight charges and avoid the embarrassing opening of your bag in public. This luggage strap has a 3 dial combination lock and a digital scale built right in. Simply wrap around your suitcase, turn it on and hold suitcase by the strap. After 3 seconds you'll know if you need reorganize to avoid airline overweight charges (usually over 50 lbs.) Strap is adjustable from 36" to 72" around to fit on most suitcases. Luggage straps reduce the pressure on the zippers of your suitcase and the lock acts as a deterrent to opening. TSA can enter bag by adjusting strap.