Alvin Adjustable Triangle 12"
Draw angles from 0-90 degrees from the baseline with ½ degree accuracy. The Tru-Angle provides the features of a 45°/90° adjustable triangle plus those of a protractor. It is made of high impact, optically clear acrylic, with die-engraved graduations for high visibility. The aluminum thumbscrew securely holds the selected angle and allows quick pickup and manipulation.