Double Square, 4" 4R, Starrett

The adjustable sliding blade is a game-changer for framing and drywall layout—way more versatile than my old fixed square. The head faces are ground perfectly square, so my corners come out spot on every time. Feels like a tool that will last for years.

I was pleasantly surprised by how smoothly the blade slides and locks into place, which makes setting angles quick and accurate. The head faces feel perfectly flat against my workpiece, giving me confidence in every mark.

The sliding blade is a game-changer for laying out dovetails and checking inside corners without fiddling with a second tool. The ground faces on the head mate perfectly against the blade with no wobble, so my marks come out dead-on every time.