The Master Lock No. 4717EURDBLU Set-Your-Own Combination TSA-Approved Luggage Padllock features a 18mm wide metal body for durability. The 3mm diameter shackle is made of vinyl covered flexible braided steel, offering resistance to abuse from baggage handling equipment. Transportation Security Administration (TSA) screeners can open, inspect and relock bags and cases locked with a TSA-Approved lock. Lock your checked baggage with the lock TSA screeners won't cut! The Limited Lifetime Warranty provides peace of mind from a brand you can trust.