It's a 19mm head, the shank is 14mm. I use them on 715, drilled knuckles and all. Yes, they are adjustable, but not much and with Evo struts on the GVR4, you need more than 1* adjustment. Plus it's just an offest type bolt, you can't dial in more or less camber. I tried them, but I plan on getting real camber bolts instead.