Bolt/wingnut things, piled up after being used in the construction of the California Avenue station pedestrian underpass, Palo Alt, California. I’m sure somebody out there knows what these are called and what they’re used for. It has something to do with concrete and rebar…

Shot with the Nikon D70s and the 18-70mm f/3.5-4.5 zoom at 70mm, ISO 400, f/10, shutter 1/320 sec. Exposure, contrast, saturation, levels, highlights, and shadows adjustments in Aperture.