I am a current PTA student and wanted a set of goniometers for myself to practice with friends and family and all the items included do the job. During corona time I had to send videos to my professors with these articles and they worked great! For the most part, the Goni's arms seem to stay in place unless you move them, which is nice so you don't have to use both hands to support them at times. The reflex hammer works great, the tape measure is accurate. If you're thinking of buying one, I definitely recommend this set.