The Master Lock No. 4689T TSA-Approved Luggage Locks feature a 1in (25mm) wide metal body for durability. The shrouded design minimizes shackle exposure and protects against bolt cutter attacks. The 1/8in (3mm) diameter shackle is 9/16in (14mm) long and made of steel, offering resistance to cutting and sawing. 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.