Originally Posted by
3alarmer
I've had better success with putting in a trashed out saddle, removing everything except the saddle rails,
then bending them into a configuration that you can grip in the vice jaws. Less slippage, more torque,
and if you are lucky that day, you can save the post.
I think though that the type of seat post that the OP has is better suited to be placed in the vise compared to say a plain round seat post. It doesn't look like anything special as well, I would probably wouldn't worry about saving it.