Detachable Adjustable Angle Woodworking Triangle RulerFEATURES Level LevelingEquipped with a spirit level, when the triangle ruler is placed vertically on the horizontal plane and the air bubble in the vial is in the middle, it means that the plane is 180, which is helpful for judging whether the board is flat or not, and can be used as a guide for cross cutting wood. Multi angle MeasurementWhen the triangle ruler is perpendicular to the ground, it is 90, and the hypotenuse has a scale of 0~90, which is