Cordes Courant Moka
Effectively, a karabiner to replace the central maillon in an SRT setup.
The Moka is an alloy, tri-act karabiner, strong, light, and convenient to use. As with the Omni, the advantages of this over a traditional steel maillon are weight, convenience (easier and quicker to unclip from the harness intentionally) and the reassurance that if any openings unscrew / undo, the karabiner is still as strong as long as the gate remains closed... not so with a maillon.
I've used one of these since the start of 2010 and find it as easy to use as my normal Omni screwgate; copes well with muddy environments and has been very valuable in sub-zero conditions, for quick changes. Cordes Courant are making a (limited) range of good hardwear these days, as well as their ropes.
Length is 87mm, weight is 54g.
Long axis strength is 20kN, gate opening is 10kn