Please note-- this item has not been tested yet. If you are feeling brave and decide to purchase it, please let us know how it held up! This is meant to be a relatively sturdy plastic joint for ball-jointed dolls, be they home-made, a modification, or a repair. The hole is cut to be an ankle or wrist joint. This joint has a diameter of 1/2 inch-- if you need a different (ie bigger) size, please send me a message and I'll be more than happy to upload a new model! Some sanding or polishing may be required.