When doing various work, it is very useful when there is no space to put the paper on which you wrote the procedure etc. It is appreciated that you can check the document without moving the face, body, hand etc. because you can fix the document to the eye.
We used several straight type 100 types and five joint type five joints. Since the joint is solid, a bit of caution is required when bending. For straight type, place your finger on the joint part and carefully bend it. You dislocate it if you do not care. One was broken arm. (You can continue to use by removing the broken arm and directly connecting the clips.) It seems that even if you treat the somewhat rough hands of the joint five-stroke type, force is dispersed to each joint, it will bend freely as I thought. Since both types are user-friendly as expected, I will repeat them.