This is a nice angle finder for the money. It is made of quality components and operates smoothly. It is light weight and folds for storage. It has a scale on the main center support/handle that has the angle in degrees as well as the corresponding half angle on the other side of the center split. It only reads inside corners.You read the angle from the bottom of the sliding piece with the locking knob on it. There are no clear indications for whether y..