Packing Included: 3 pieces 360 Degree Goniometer 6, 8, 12inch, 8inch Bone Goniometer, 6inch 180 degrees Goniometer Finger GoniometerMulti scale display: easy to read, the goniometer head features three scales to allow for a variety of readings. The arms ruler features both inches and centimeters and can be used on various occasions with 360-degree rotationTransparent durable: the goniometer is designed with transparent color, can clearly observe the range of motion of the joint. They are made of high-quality PVC material, tough, wear-resistant, and durableFinger goniometer: flexion and hyperextension finger goniometer is used for easy ROM measurements of the MCPs, PIPs, and DIPs. This clear plastic finger goniometer measures a range of 30 degrees of hyperextension to 120 degrees of flexion in one-degree increments without repositioning the goniometers proximal baseWide application: the angle ruler set is a professional ruler, which can be used for the range of joint motion, measuring the range of finger movement, measuring the angle of the spine, etc. It can also be applied to the production of architectural drawings and horizontal measurement