Watchdog Security Pet Door Cover

Watchdog Security Pet Door Cover Sizes: Large Door - Interior Flap of 11 X 17 1/2 with an Exterior Frame of 15 1/2 X 21 1/2 and 1/2" Depth X Large Door - Interior Flap of 12 X 24 with an Exterior Frame of 16 1/2 X 28 and 1/2" Depth XXL Door - Interior Flap of 16 X 26 with an Exterior Frame of 20 1/2 X 30 and 1/2" Depth Watch Dog Security Pet Doors has developed the answer to security problems. Beginning with 12 gauge steel, Watchdog builds a frame with cover and a combination lock to fit on the outside of your house. When you want the dog to have access, you leave the Watch Dog Security Pet Door Locking Cover open. When you want security, you close the steel door and engage the combination lock. Bingo! The pet door is no longer an easy way to break into your house. Key Points The combination lock is set by you to a unique security code. Don't forget it! There's no way to unlock this steel cover over your pet door without that code. There is a special version with special bolting