Master 5420D portable push button lock box. Designed to lock over house door knob and levers. 2 7/8" wide lock body with a 13/32" diameter shackle that adjusts from 3/4" to 1 3/4" clearance. Body and shackle are plastic and vinyl coated to protect door and lock. Inside measures 4 3/16" high x 2 3/8" wide by 1" deep. 4 dial combination can be reset to your number. Protective hinged plastic weather cover for push buttons.