Carabiner knife

Any use a Carabiner knife? I have been trying to find one that wouold be good for backpacking, but the only two i have found that are worht anything, are still junk. the Kershaw small carabiner knife is not big anough, and the large one flops open to easily. there is a odd folding style that when your closing it...well lets just say i want to keep all my fingers.

any way if some one currently uses or knows about a good quaility carabiner knife let me know.
thanks