This adjustable triangle provides the features of 45/90° triangle, plus those of a protractor! Features an 8” straight-edge, engraved graduations for high readability, and an aluminum thumbscrew that holds your desired angle securely in place. Draw angles from 0° to 90° from the baseline. Inner graduations on arc give degrees of one angle while the outer row of figures gives the degrees of the complimentary angle.
Made from clear acrylic. Approximately 0.100” thick. Circular openings are 0.25”, 0.5”, 0.75” and 1” in diameter.