Material: Durable zinc alloy and steel shackle. Dimention: Lock Body with shackle: 1.38*0.47*2.52 inches. TSA accepted and recognized locks - TSA screeners are issued codes and secured tools for secured access to open the locks. 4-Dial combination lock for improved security - Original combination number is 0-0-0-0, each lock can be reset to its own combination.