These were used to replace the ones in a Licensed Floyd Rose made in asia ( from a Maison ).
They fitted well, gave a good grip and I suspect that you will wear off any Allen key before you do it to the screws. They seem very solid.
Mine came without the knurled effect ( is for grip, using other tools ) in the screw heads, but to me that would be just an aesthetic thing rather than an issue, I actually like them more with a smoother look.