I’m pretty useless as a handyman. Tools are not my friend, and I try to avoid them whenever I can. When my wife and I were looking for a baby gate we were set on finding a gate that did not require installation of any kind. We would eventually settle on something very similar to the First Year Hands Free Gate. It requires no screws and is pressure mounted to the door frame.
Some entrances may require a gate wider than 44 inches and require a larger gate like this offering from Evenflo. It expands to 60 inches. Rather than buying multiple gates for your home, these gates are convenient since you can easily move them around your house.
Avoid the screws and hardware needed to mount permanent gates and keep your eyes open for pressure-mounted options.