30cm stainless steel goniometer for accurate measurement of joint angles. - Model: Goniometer Todai Style 30cm - Application: Measurement of joint angles Includes: Percussion hammer My son used this in physical therapy school. I'm selling it now as it's no longer needed. It has been used, so please understand that there may be minor scratches. The movement is smooth. The storage box is crushed and scuffed, so it will not be included. Please ask if you have any questions.