Single blade Blackout 1550 Ken Onion Speedsafe Assisted Opening Linerlock Pocket Knife. Designed by Ken Onion. 4-3/8 inches closed. 7-5/8 inches open. When Kershaw's 1550 Blackout was first introduced, it was recognized as a Blade Magazine Blade Show Best Buy. It features a 14C28N stainless-steel blade for strength and excellent corrosion resistance, and scratch-resistant Tungsten DLC coating for a handsome, non-reflective surface. Blade etched "kershaw SPEEDSAFE USA" and "1550 KAI Patented Ken Onion Design". Stainless steel clip deep etched "kershaw" and "PAT NO. 454,768 455,062". For a comfortable and stable grip, the Blackout has an extremely durable, contoured handle of glass-filled nylon. A locking liner maintains the blade in a safe and secure position.