Alvin Tru-Angle 12" Adjustable Triangle with Inking Edge
The Alvin Tru-Angle 12" Adjustable Triangle combines the features of a 45°/90° adjustable triangle with those of a protractor. Angles from 0° to 90° can be drawn from the baseline with ½° accuracy. Die-engraved graduations for high visibility. The aluminum thumbscrew securely holds the selected angle and allows quick pick up and manipulation. Made of high impact acrylic that is 0.100" thick and optically clear to eliminate parallax and allow close pencil tolerance.