This is a special high end version with state of the art locking mechanism, made by PIXCO.
This adapter allows you to mount NIKON auto focus or manual focus lenses (AI, AIS and AF lenses) on all Canon EOS camera body
You have to manually control the lens aperture and focusing. Camera metering will function in Av (aperture priority) or Manual mode. It's not recommended to use on Nikon 'G' lens (without manual aperture ring) because the aperture will always close down to the max f stop.
It has a locking pin which secures the lens to the adapter
It allows the lens to focus to infinity