Q: I am hanging a series of wall sconces in my house and I want them to all hang at exactly the same height. Underneath the sconces, I will be installing a chair rail around the perimeter of the room.

Laser levels are indispensable for ensuring measurement accuracy. We tested the best-selling models—see how they fared.

Whether you're mounting fixtures, installing shelving, or hanging artwork in your home, it's critical to ensure the item is perfectly level. While traditional bubble levels are useful for quick checks ...