I bought 3 on accident and was planning to sell the other 2 to guys at the firehouse... After I received them I decided to keep all of them. 440 stainless with an awesome assisted opening feature. The closest thing to a switch blade you can get. I use one for a regular carry knife and keep a secong in my gear. VERY sharp, holds an edge well and good for one handed opening in a pinch. A++++++++++ Im ordering 10 more to sell at the firehouse, they all wanted it as soon as they opened it for the first time. $$$$$

I bought my 1st HEAT knife over 5 yrs ago. It's still in my poket every day! I love the rapid assisted fingertip opening that KLIKS when you use it. Sounds like a switchblade and just as fast when you get used to it! Sharp! and resharpens enough to shave with just a few swipes of my Lansky sharpener. I have sine bought 3 more incl partial serrated, Tanto blade, and back up to this one. I have heard complaints about handle 'being plastic' but its actually much more durable. I gave it 5 cause it's the knife I carry out of well over 100 different knives I own!