This is a model I received at a manufacturer's seminar over 10 years ago. The model on the left seems to have been dropped once, and the pin is slightly bent. It goes back in if you press it, but it lifts up a bit as shown in the photo when you let go. Good for practice, etc. To prevent damage, I will disassemble and pack it, and ship it via Nekopos. #DentalTechnician #Dentistry #DentalTechnician