I just received the blue OTF knife and I am very impressed. I am a Heretic knife buyer and have a few from that brand. This Daggerr OTF is a solid knife. Its has a solid deployment and sounds solid and not hollow. The blade is D2 and solid. I have several different brands of OTFs and this is on top of the list. I also have the Vendetta which I love. Highly recommend Daggerr knives.