pixabay and 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.
This image was acquired from
Keywords from Image Description:
eye bolt frame loop drill hooks backup climb sport climbing rock wall rock wall mountaineering climbing route tour route stable metal protection security plunge start Climbing bolt public domain. de Bohrhaken zum Klettern gemeinfrei origina upload date BCst Bsebohrhaken Simon Steinberger other versions confirmed Czar files
Page 2017 Free-images.com. All images are Public Domain