100% Polyester Large capacity key lock box enables secure storage of up to eight standard (3 1/2") house keys and one car key fob; Shackle fits most ball, biscuit, and tulip door knob styles Include one Faraday bag (anti theft pouch, anti-hacking case blocker) for car key fob to block RFID Signal Key Lock Box is constructed with a metal body for durability, vinyl coated shackle and sponge pad on the back to prevent scratching Set your own four-digit combination lock box; Front opening door: Patented large knob, easy to open and prevent opening in force Exterior dimensions: 7??? (178mm) H x 3-1/2???(89mm) W x 3-1/4??? (79mm) D; 3/8??? (10mm) diameter shackle; Storage Space: 2-7/16??? (62mm) H x 3-3/8in (95mm) x 1-3/8???(35mm);