I've been carring my Delica for 6 years now, and an Endura for 6 1/2. One time my Delica opened in my pocket. I carry it on my left side with my keys in the same pocket. One of my keys snagged the hole, and "slice", one small cut. I have since adjusted my keys, and haven't had any more problems. I also must say that my Delica opens easy.
Blades