Here is another, WOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

A Batarang knife might look cooler, but the Zero Tolerance 0350BW is much sharper. For those who like to get technical, the blade itself is crafted from S30V stainless steel with non-reflective Tungsten DLC (Diamond-Like Carbon), and BlackWash coating gives it a well worn look. The SpeedSafe assisted opening system lets you deploy the blade quickly and easily, even in gloves, using the ambidextrous flipper. Product page. Continue reading for the video and more information.

From: http://www.techeblog.com/index.php/tech-gadget/zero-tolerance-0350bw-knife-cuts-through-phone-book-like-butter-video-proves-it