Master Lock Master Padlock Kd Unit PK. This padlock defeats attempts to breach or overrideMaster Padlock Kd 4KD's strict two-stage testing. The first step is a five-step sand test that the padlock has successfully completed. Each successive sand test is equal to or greater than the four previous tests. If a padlock fails during any of the four tests the next step is to simply open the padlock. Two-stage salt water testing and four tempered steel shackles withstand the most rugged testing. Customers can be confident that the padlock they receive will meet or exceed Master Lock quality standards. Specifications for Master Lock Master Padlock Kd 4KD: Manufacturer: Master Lock Fabric/Material: Hardened Steel Laminated Brass Weight: 0.49 lb Package Contents: Master Lock Master Padlock Kd 4KD / 300073-188 The Master Lock Master Padlock Kd 470-4KD 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 Master Padlock Kd 4KD Unit PK