Product Features High Security 3-Dial Combination TSA Lock. Designed to be opened and re-locked by airport security luggage inspectors without damaging the lock. Travel Sentry is the luggage security system officially recognized by TSA (Transportation Security Administration) at all USA Airports and H.M. Revenue and Customs in the UK. Travel Sentry Approved luggage and locks can be opened by the above two security agencies allowing inspection without damage or delay. Lock your bags with confidence. Feel certain your possessions are secure. Travel with peace of mind. Length of steel rope: approx. 3.7-Inch (or 9.39cm).