Solid Carabiner. Real Small
I was surprised at how sturdy and solid this little guy felt, and how good the gate action feels. HOWEVER, KNOW HOW SMALL THESE ARE: 3 inches on the long axis, 2 inches across. I love them for anchors and racking nuts and what not, but would not put them on the rope end of a quickdraw.
I'm new to climbing and have only been on sport / top-rope single pitch stuff, but if I ever do backcountry alpine climbing, I'll be getting more of these for their weight and size. They are tiny!