Lee Valley just posted a straightedge that uses magnets to hold a steel rule at many commonly-used angles, including ones for isometric drawing. Hmm — the last time I made an isometric drawing by hand, I was in middle school shop class. With CAD becoming ubiquitous and free CAD-like programs available to the general public, I can’t imagine there’s much use for hand-drawn isometric drawings anymore unless you’re a die-hard drafter.
The 12″ by 2″ aluminum body straightedge uses rare earth magnets to hold a 12″ by 3/4″ steel rule in slots machined at 0°, 30°, 45°, 60°, 90° and their supplement angles, although Lee Valley is quick to point out that this is just a quick layout tool and not a precise instrument.
Lee Valley etches the rule in Imperial and Metric graduations on one side and angle guides on the flip side. They anodize the aluminum and chrome-plate the rule to give it a nice, lasting finish. When you’re done with the tool, the rule stores in the other side of the straightedge.
Since Lee Valley lists patent pending under this this product, I’m assuming they (or Veritas Tools) are the creators. Their magnetic straightedge will cost you $40 before shipping.
Magnetic Straightedge [Lee Valley]