This is a precision tool for drawing lines at specific angles, an essential for drafting, design, woodworking and DIY projects. With clear construction for easy viewing of your material, this adjustable triangle is accurately divided into increments of 1/2° from 0° to 90°. This triangle has a thumbscrew that locks the angle securely in place so that you can continue to work without loosing your place.Details:10in (25cm)Warp-resistant acrylic constructionFeatures beveled edges for smudge-free inkingIncludes a magnifier for preciseEasy-to-read settings