This is a MasterLock Gun Lock known as the Cable, model 99DSPT.
The Master Lock No. 99DSPT Cable Gun Lock is 14in (35cm) long and is made from braided steel for maximum strength and flexibility. The padlock features a 1-5/16in (33mm) wide laminated steel body for maximum strength and reliability.
Features:
4-Pin Tumbler Cylinder
Steel Cable Resists Cutting
Dead-Locking, Anti-Rap Mechanism