1. Package contents: It includes three 360-degree goniometers with sizes of 6 inches, 8 inches, and 12 inches respectively; an 8-inch bone goniometer; and a 6-inch 180-degree finger goniometer. 2. Multi-scale display: It is convenient for reading. There are three types of scales on the head of the goniometer, allowing for multiple readings. The arm ruler of the goniometer is marked with both inches and centimeters, and it can rotate 360 degrees, suitable for various occasions. 3. Transparent and durable: The goniometers are designed to be transparent, enabling clear observation of the range of motion of joints. They are made of high-quality PVC material, which is strong, wear-resistant, and durable. 4. Finger goniometer: The flexion and extension finger goniometer can easily measure the range of motion of metacarpophalangeal joints (MCPs), proximal interphalangeal joints (PIPs), and distal interphalangeal joints (DIPs). This transparent plastic finger goniometer can measure the range from 30 degrees of hyperextension to 120 degrees of flexion in 1-degree increments without repositioning the proximal base. 5. Wide application: This set of goniometers is a professional measuring tool, which can be used to measure the range of joint motion, the range of finger movement, the angle of the spine, etc. It can also be applied to architectural drawing and level measurement.