Review on Accurate and Versatile: Exploring the Johnson Level Tool 406EM Combination by Adam Mazie

This is an accurate small combined square image. My only issue with this is that the thumbscrew that tightens the rule has to really be screwed in to hold tight. Even so, it sometimes loosens on its own, so you'll need to make sure it's tight every time you pick it up. For a quarter of Starrett's price, that's not bad.