Check the listing for details. MASTER LOCK 6121NKA Keyed Padlock, 7/8 in,Rectangle,Black 4EZG5. Condition: New. Listed at 41.28 USD. Padlock, Shackle Dia. 5/16 in, Shackle Height 1 1/8 in, Shackle Width 7/8 in, Shackle Material Boron, Body Height 2 13/16 in, Body Width 2 1/8 in, Body Thickness 1 in, Body Material Steel, Number of Bumpers 0, Number of Pins 5 Pin, Key Type Alike, Control Key Registration Required No, Opens with Key No. 10G020, Body Color Black, Body Finish Laminated, Keyway Type Master K6000, Weather Resistant Yes, High Security Yes, Interchangeable Core No, Padlock Body Shape Rectangular, Rekeyable Yes Covered lock body padlocks have a cover that resists corrosion and scratches, making them ideal for use both indoors and outdoors to secure access to goods. Different cover materials provide different levels of security. They have a standard shackle that is less than 1.5" in vertical shackle clearance and.