The Master Lock No. 4686EURT Set-Your-Own Combination TSA-Approved Luggage Padlock features a 30mm wide zinc body for durability. The 3mm diameter shackle is 20mm long and made of steel, offering more strength. Transportation Security Administration (TSA) screeners can open, inspect and relock bags 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.