Master Lock Circuit Breaker Lockoutfor Unit EA. This Lockout by Master Lock helps provide a "no spark" work stoppage in tamper proof locking stations. The Master Lock Circuit Breaker Industrial Padlock is constructed with a zinc chromate finish for increased corrosion resistance. The lockout will provide a physical barrier to those who must work in the area. This Master Lock 493B Circuit Breaker Lockout will also provide a visual warning when the lockout is required. For a great padlock that will effectively prevent cutting and binding choose the Master Lock 493B Circuit Breaker Lockout. Specifications for Master Lock Circuit Breaker Lockoutfor 493B: Manufacturer: Master Lock Weight: 0.01 lb Package Contents: Master Lock Circuit Breaker Lockoutfor 493B / 300052-976 The Master Lock Circuit Breaker Lockoutfor 470-493B is a quality addition to the Master Lock lineup. For more great deals on Locks by Master Lock please browse our Master Lock Locks page. Master Lock Circuit Breaker Lockoutfor 493B Unit EA