Whether you are tackling a full-on carpentry project or simply hanging something on your wall, a bubble or spirit level is an essential tool for getting things done right. All of us have had times ...

When using a spirit level (aka bubble level) to mark mounting points on a wall, you almost need three hands. The Levelmarker 2.0 is designed to address that problem, by combining level-holding and ...

Miss your shot and scratch on the eight ball? It’s natural to blame the table for not being level so you can save face, but in all likelihood, you’re probably right. [Huygens Optics]’s father never ...