Now you dont have to create templates for each new job & remeasure tricky angles all over again, this measurement tool will you time & effort, introducing the Corner Angle Finder. A measurement tool that enables external and internal angles to be read directly from a scale. It divides the top angle in two without changing the setting which makes it convenient & easier than traditional measurement. It works well on both concave & convex angles, which eliminates do over & wasted material. A must-have tool for every handyman!