Single blade Whirlwind 1560 Ken Onion Speedsafe Linerlock Tactical Folding Pocket Knife. Ken Onion Design. 4-3/8 inches closed. 7-5/8 inches open. Blade etched "kershaw Ken Onion USA" and "1560 KAI Patent Pending". Stainless steel clip deep etched "kershaw". For a comfortable and stable grip, the Whirlwind has an extremely durable, contoured handle of glass-filled nylon. A locking liner maintains the blade in a safe and secure position. With original box and paperwork.