Yeahhhh and they're both Allen keyed. And they are both the string lock screw, the shorter thick ones do the same as the longer ones. I have a Schaller Floyd on a custom strat style warmoth guitar that has them. They are simply shorter. No Floyd rose style bridge can be used with the ball ends attached to the string. I think we (or I) may have misunderstood some terminology earlier. I reread and I referred to what you call the string lock screw as an Allen screw... Because well, it is an Allen screw. But "string lock screw" is a more specific term. But the short thick ones I shared earlier are also string lock screws.