The H&K 14460BT Nitrous Blitz Spring Assisted Knife Black Plain Edge. The 14460 Nitrous Blitz is a lightweight, slim folder. It utilizes the spring assisted Nitrous mechanism, which is built directly into the titanium liners. This assisted opening system propels the blade open with ease using the ambidextrous thumb studs. This knife has a tactile G10 handle with an index groove and cutout for simple release of the liner lock. The blade on this Blitz is black BT2 coated 154CM steel with a plain cutting edge. The H&K Blitz is a smooth operator with a cool look and feel.