Thanks for your response jimmer 5.
So your saying the 560 is AS Strong/Stronger than the 350 in materials both blade and handle?
Like I said, the end use of this knife for me is "hard use". This was not going to be a box/rope cutter.
If you tell me it will hold up AS GOOD as my 350, I will open her up.
It's hard to put a quantitative measurement on "strength", except for maybe the material thickness. The 0560 blade is 0.156" thick while the 0350 blade is .0121" thick. The 0560 has a 0.175" thick titanium framelock scale, while the 0350 has a 0.080" locking liner. Both use top notch powdered steels for their blades. Regardless of any of these measurements, I would argue that the 0560 is a a bigger beefier knife than the 0350. It's definitely as strong or stronger than on 0350.