After I cut the hole in the wall following the enclosed instructions, my 17 year old daughter installed the door.

Bought two of these for our dogs. Have used them for around three months. Easy to install and have worked great!

Recently moved and in the process made a deal with one of the dogs that if new house didn't have a sliding glass door he could have a bigger dog door if he'd use it.6" wide dog door, 6 3/4" wide dog, and 2 story house, he was more frequently not making it outside.Dogs love the dog door. Even the particular 'puppy' who doesn't do double flaps, has got it down!They're happy. They can come and go. Torment the neighbor when we get to enjoy his music in the house.The insert to close the opening is very different from any other dog door I've ever seen.It's aluminum, most are plastic, and its designed with the intention that it never is fully removed from the opening. Doesn't get lost that way. There's a screw with a large head, almost knob sticking out in the bottom of of the 'flap'. Lift the bottom edge to the top of the door and tighten the screw, door is open. Loosen the screw, and you can close the door.One thing I do really like is that when you close it the 'flap' drops completely behind the frame of the dog door, inside the wall. Previous dog doors, the closure piece has only dropped down even with or dropped down in front of the bottom edge of the frame.All of my chihuahuas learned if they could get their paw or nose under the edge they could still get out. No locking them in the house with the skunk in the yard. They did then lock themselves outside.You can still remove it completely like most. I find it much more difficult than traditional ones to inset into the track so hoping the screw holds out. Especially given no crittters in the yard so far so not really a need to close it....I really liked the unique size of this dog door. It is slightly larger than the average dog door of comparable size. With little dogs this makes a big difference. Small breeds are unique in many many ways, often long legs/or short legs, wide chests, and long bodies means nothing fits or works without major customization first. The standard small dog door at 5" wide and 8" tall, or cat door 7.25"wide 10" tall are generally rated for dogs/cats 12-15lbs.Little 'puppy' chihuahua at 9lbs can do that, but the two brothers at 10.5 and 12 lbs it's a wiggle dance.I didn't make the fat dog wiggle anymore, the small size would've been an upgrade as it is 6.3" wide, average small dog door is only 5" wide, or 6.0" for sliding glass door. I went with medium door, and up to flap opening 9.25" wide and height of 12.9" most standard med dog doors are only 8" wide and 12" tall.At 8" wide he flies right through at full speed he gets going to get up the very steep ramp he slides down going out, 3ft vertical drop in over 2ft distance, and its 45 ft through the house before he comes to a stop. Happy, old, fat dog.

Perfectly suited, well made , both dog and cats happy and go out to their safe enclosure as they choose

Wir haben die Klappe von innen und außen mit Bauschaum eingeklebt. So sind alle Ritzen zu und die Klappe sitzt fest. Die Tür verschließt gut, auch wenn es windig ist. Und die Mäuse bleiben draußen!

Sturdy, good quality and comes with a cardboard cut out with the size measurements to make it easier to install. Very happy with it.