Skewers? forget that, such a pain. my "kebabs" are not kebabs at all because I hate using the skewer. the food always rotates on it when you try to rotate it which forces you to use 2 skewers. I just cut everything up into the size you would typically put on the skewer and cook them separately.
I've got some flat stainless steel skewers that solve that problem. But the skewers get HOT, so, you can't touch them, I flip/rotate with tongs. But the meat stays together.