I bought these to use as a tool to help me to restring vintage dolls. They work very well for me to be able to reach inside the body of the doll and pull out the elastic. The fact that they lock, lets me clamp onto the elastic and have a good hold on it, in order to pull it through to the other side.
The purpose of this product was to pull the hair out of my dog's ears just like at the vet. This tool would not grip the hair from her ears at all. A waste of money!