This looks pretty awesome, but it’s difficult to say just how practical it is until you try it. I’m willing to do it, but first I need a nice Leatherman. The process looks surprisingly easy, assuming you have some sort of way of cutting hardened steel. You just use one of the multitool’s bits as a guide and then drill the right size hole — presto!

I think, personally, that’s better to go the other way and install a multi-tool on your keyring. I’ve had one of these things for a couple years and it’s gone through airports all over the world. Sharp as hell, never lets me down (though it has occasionally laid me open pretty badly). [via BoingBoing and MAKE]