S&W Extreme Ops. Black, serrated blade, automatic open. It has been pretty reliable for the last 5 years. Used it as my on duty/off duty knife for 2 years and it's continued to be my sidekick off duty for the last 3 years. The spring is just like new; the blade is a little dull as a result of pretty heavy use and me too lazy to sharpen it, but the serrated edge suffices for my purposes. Bought it for $40 back then and I'm going to use it until it falls apart. It being automatic, of course, will limit who can purchase it.