This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Chain coupler detail. photo by Zoltn Bogoly en Riggwelter Bogoly zoltan en Bogoly zoltan original upload log page en Chaincouplerdetail Bogoly zoltan bytes no by Zoltn Bogoly Screw coupling
Page 2023 Free-images.com. All images are Public Domain