Body Diameter: 2-7/8"Shackle Size: 3/8" Dia. X 19/32" TallOpening Width: 1-23/32"Keyed Alike (Key #400K534)Designed For Commercial And Industrial Applications, Commonly Used To Lock Truck DoorsLock Body Conceals Shackle Eliminating Cutting And PryingHigh Security, Rekeyable 6-Pin Cylinder With Spool Pins Is Virtually Impossible To PickComes With 2 Keys