Master Key Combination Lock gives you the convenience of a keyless combination lock but allows you to disengage the lock with the matching key set and the ability to re-learn your combination using the included code finder pin. The 4-digit design enables up to 10000 possible combination codes. A hardened steel head 7-pin lock head/tail pin and 6.5" coated galvanized steel cable ensure superior strength and deter tampering. Carry this lightweight portable and compact security solution anywhere your job takes you.