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 ...