Obviously we all use a drill press vice or clamps to hold work safely on the drill press table, don't we?
The picture shows a useful tweak for when that isn't wanted. It's simply an aluminium post that's got an M12 thread up the lower end and a bolt to fix it to the table. It stops hand held items from whizzing around if the drill grabs and only needs to be done up hand tight, so it's simple to adjust.
The good thing about this example is that it wasn't even designed for the job. I'd used it as part of a jig when holding things in a hex collet block on the milling machine to drill holes at 120° intervals around their peripheries. When I get around to it, I might make a custom T bolt for it, but for now it works perfectly well with the hex-headed bolt and washer.
Picture's a bit limited, but I just snapped it on the phone tonight after using it.

Edited By Mark Rand on 29/08/2018 21:05:29