Master Lock 5422D Pushbutton Lock Box 

• Over-the-Knob Design for Portable Installation
• Convenient Pushbutton Locking Mechanism in Familiar Format
• Resettable Combination Using up to 12 Letters, Numbers or Both!
• Large Push Buttons for Ease of Use, Even in Low Light Conditions
• Protective Weather Cover Prevents Freezing and Jamming
• Large Internal Cavity and Removable Key Hook Prevents Jamming
• Molded Lock Body and Vinyl Coated Shackle Prevent Scratching
• Internal Dimensions: 3-1/2" (89mm) H x 2-1/4" (57mm) W x 1" (25mm) D
  
• Specs_Width: 3-1/8" Wide; A: 13/32" (10mm) B: 1-5/6" (47mm) C: 1-13/32" (36mm)
• Best Used For: Real Estate Access Control, Spare Key Storage & Access Card Storage, Security Gates & Fences