If you have a dog, or know they can be nosy S.O.B.’s. Digging, jumping, scaling, they’ll do pretty much anything they can to see what’s happening on the other side of that fence. With the Petpeek Fence Window for Pets, your sneaky, spying dog can now safely SEE ALL THE THINGS! Easily installed in wood, vinyl, and other materials. No pets? Install one in your kid’s playhouse!