Abus 148tsa combination cable lock essential security for visitors to the usa the tsa transport security administration is an agency of the us department of homeland security which is responsible for the safety and security of the public travelling to the united states the abus tsa luggage locks allow the agency to open and search air passengers luggage and then relock using a tsa master key specifications width 20mm height 54mm depth 14mm shackle width 37mm shackle height 17mm shackle diameter