Dee Shackles and Shackle Key

[Cruz2]

Does anyone know can this type of dee shackle be adjusted using the key/wrench in the second photo?


https://ibb.co/GdcH9Js


https://ibb.co/6vccb8Z

Also, this dee shackle below has a "key" on the end. Does this mean it is adjusted using this key, and a separate key/wrench is not required?


https://ibb.co/4dkVsgd

Thanks.

[mm5aho]

The first type requires an allen key. It has a recessed hexagonal head to undo. Its advantage is supposed to be that it will not be caused to come undone by things touching it.
The last one needs something to turn the pin using the handle (the exposed flat with a hole through), and that might be fingers, for finger tight, or that shackle key, by putting the tapered slot over the flattened pin handle and turning.
Most shackle applications require more that finger tight. In some cases (such as anchors) locktite fluid is a great way to prevent unintended loosening.

[Cruz2]

Thanks very much for explaining that.