This is a great little gadget. Not keen on the cheap (red) plastic protractor tip, but a ruler with various slots will (hopefully) draw a straight line. The main thing that the design lacks is the presence of a hex key for tightening / loosening the screws to adjust the angle. Since there was no Allen key, I at least made sure I could keep one of my own wrenches at the end so it was available when I needed to adjust the angle of the protractor. I will update this review as soon as I have the opportunity to use it.
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