Used approximately 8 or 9 times per season, starting in early 2025, on rocky shores. Diameter is 55 cm. There are some scratches and minor rust from use on the rocks, which is unavoidable. However, I performed regular maintenance after each use, so there are no issues such as salt corrosion, seizing, or other corrosion, nor any deformation, creaking during use, or damage to the screw threads.