Hi, I just bought three new survival knives, after years of only having folders. They are all by MTech: The MT-573, HK-6001, and the HK-2044. The MT is full tang, so I'm not worried about the structural strength of that one, however the 2044 has a hollow handle with a butt cap for storing matches and the like, and so is not full tang. The 6001 I'm not quite sure about, since there is an alan screw in the pommel which makes me think it may be hollow. My question here is, should I be worried about the overall strength of these knives, seeing as they're not full tang?