Check the listing for details. MASTER LOCK 21KA Keyed Padlock, 3/4 in,Rectangle,Silver 1U161. Condition: New. Listed at 31.10 USD. Padlock, Shackle Dia. 5/16 in, Shackle Height 15/16 in, Shackle Width 3/4 in, Shackle Material Steel, Body Height 2 13/32 in, Body Width 1 3/4 in, Body Thickness 7/8 in, Body Material Steel, Number of Bumpers 2, Number of Pins 5 Pin, Key Type Alike, Control Key Registration Required No, Opens with Key No. 10L320, For Use With Gates, Cribs, Vending Machines, Commercial, Automotive, Body Color Silver, Body Finish Laminated, Keyway Type Master K27, Weather Resistant No, High Security Yes Laminated steel lock body padlocks have bodies that are made up of plates of steel fastened with steel rivets and are used for securing goods. They're not as strong as solid body locks as the steel rivets can be tampered with. These padlocks are commonly used in indoor applications as they are less corrosion.