Robust, impact-resistant polymer body with chrome-plated, solid steel shackle. Resettable 3-digit combination lock, ideal for securing zips and closing travel luggage, including backpacks, daypacks and briefcases. TSA® licensed product trusted by international airport authorities, customs and security providers. TSA screeners are issued codes and tools for secure access to opening the lock so there is no damage to the luggage during inspection. Horizontal x vertical shackle clearance: 12.4 x 20.5mm. Shackle dia 3.5mm.