Corner Angle FinderEnables external and internal angles to be read directly from a scale. Divides top angle in two without changing the setting. Ideal for measuring angles when miter cutting large boards, fillets and architraves. FEATURES MUST HAVE TOOL IN YOUR TOOLBOX. Really helpful when you have to cut tricky custom angles will save a lot of time and frustration for measuring corners and cutting quickly. No more do over and wasted materials, whether you're working