Good Small HMS Biner
I have one of these that I've used for various things, including belaying and for the end of my PAS sling, and it works well, but I prefer something slightly larger for belaying with. It also works well with a Munter on small cords, but is probably a bit small for anything over 9mm or so (although it is quite good for a self rescue biner for use with PMMO hitches tied with cordalette and the like). Since I upgraded all my rigging biners to Shadow lockers, it now lives on the rope end of a locking draw, which it also works well for. It does have the sexy feel typical of all DMM biners.