The magetic holder is nice, but… $13 for $4 (at most) worth of magnets and $negligible of doublesided foam adhesive tape (or a drop of epoxy)?
Check the prices here:
Or, for screw-mounting for larger loads, use the countersunk ones here:
Probably could be found quite cheaper with a bit of shopping around.
For added effect, use a bigger magnet to account for the gap, and put it on the light cover (or any other structure) from behind.
The tools look nice but seem to be rather anaemic.
For one of smaller key bunches I have a version of KeySmart made of a standard screw with a nyloc nut and an adapter for keyring mount.
For a pair frequently used around the house (door/garage, or door/workshop…) I use a trick where the screw is tightened more. The two keys are angled 90 degrees, and allow taking the pair in hand, using one key, turning 90 degrees, using another key. Loose movement may be more desirable in other scenarios; e.g. this is rather nsuitable for carrying in pocket.
Thought. What about grinding and sharpening the top edge? Could cut it while still being able to work as a regular key. For bonus points, as the alloy is rather lousy for a blade, hard metal could be laser-welded (or brazed, or electrodeposited, or joined by other suitable way) to the edge.
Edit: a keychain with keys can be used as a makeshift weapon; hold the ring in the fist and let the keys stick out between the fingers. Could there be some design of such keyholder that’d facilitate its use as a knuckle-duster while not being obvious as a weapon?
There are many variants, e.g. this one: http://survivalgeartools.com/product/2-in-1-womens-self-defense-prtection-safety-stainless-steel-cat-head-keychain-key-open-with-belt-case/
A combined weapon and a bottle opener.
Without the bottle opener, there are dozens of variants; Brutus, Safety Cat, Knuckle Kitties…
(note the plastic shrinkage, an artefact of somewhat less than competent mould design and/or injection machine operation).
I wonder if the design could be made less conspicuous while keeping the functionality. Something tool-like that can be held this way but look more asymmetric. One of the holes could be partially open or act as a bottle opener, the other one as some sort of a holder or be the staggered hex-shape for the openings for the hex nuts. The tips could double as screwdriver bits, Phillips and flat; or other similar functionality. The shape and function are interrelated; the weapon function can be hidden between the others with relative ease.
