The bevel protractor can and lock from 10 degrees to 170 degrees, ensuring the perfect and precise miter angle we can measure, the tool accurately measures the angle, and then locks the angle for a perfect split angle. Easy-to-adjust and easy-to-read markers. The angle ruler can precisely measure any desired angle or shape by tightening or loosening the screws, locking perfectly at any desired angle, while marking as needed without messing with the paper template and cutting out. Angle squares are widely used for a variety of angle and diagonal problems. Such as tile, brick, stone, wood, laminate cutting and any DIY project. The multi-angle measuring tool can be freely retracted and folded, which is convenient for us to carry and store. Outside and inside corners can be read directly from the scale. Divide the top corner in two without changing the settings. perfect for measuring angles when beveling slabs, fillets and lintel . Colour:As shown Material:aluminum Size:48cm Package Contents: 1 x Angle Goniometer Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.