Package include: you will get 2 pieces 360 degrees goniometer 12 inch, it can help we assist in physical therapy by determining the range of motion of a joint; It is a kind of equipment that is always available at home360 degrees of coverage: our goniometers offer 360 degrees of coverage in 1-degree increments and can be applied on various occasions with 360-degree rotation, various scales can offer a variety of readingsClear reading: the clear plastic permits observation of the joint's axis of motion and range of motion, you can to place the device directly on a joint or limb for easy observationTransparent sturdy: they are made of quality plastic material, tough, sturdy and is designed with transparent color, can clearly observe the range of motion of the jointWidely apply: 360 degree goniometer which can be applied for measuring the range of joint motion and the angle of the spine, etc.; It can also be applied to the production of architectural drawings and horizontal measurement