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French doors usually have two handles, with one for each door. However, some French doors only include a single door adjacent to a panel of glass that doesn’t open or close. In that case, you’d have a single handle on the door side and no handle on the stationary side.

Smart door locks are safe to use and are usually considered safer than traditional locks with keys. While all electronic devices can be hacked, that doesn’t happen nearly as frequently in real life as people may think. You can also invest in multiple locks of different types for enhanced security so you don’t rely solely on one smart lock.

A prehung door is a door that comes ready to install, already mounted in its frame with hinges and stop molding included. Because everything is factory-aligned, installation is quicker, more precise, and convenient, as you don't need to drill or align the hinges yourself. This makes it a smart option if your current frame is damaged, uneven, or if you're working on a new build. Installation involves fitting the entire unit into the rough opening, shimming and leveling it, and then securing it. If you are replacing an existing prehung door, the process is even simpler, often just requiring you to swap the old unit for the new one and secure it with a few screws. Prehung doors typically cost only slightly more (around $20) than a door slab alone, making them an efficient choice.

The difference between a mortise latch and a tubular latch is how they're mounted. A mortise latch has a single integrated lock body. One long rectangular space is cut into the door to contain it. A single keyhole is used to unlock both the dead bolt and latch from the outside. A tubular latch is a standard setup with a dead bolt separate from the regular spring bolt latch.