I have had this knife for many years. I dont even remeber where I obtained it from. It appears to be Russian or Chinese Military. Its a plastic handle and sheath. The blade is spring loaded and collapses into the handle for storage. Has two buttons that lock the blade into the open position and these must be pushed to collapse the knife. Its pretty cool. Never seen another one like it. Anyone have any ideas? I am new to this site by the way. So far I am very impressed!