I'm soo obsessed with my brows, but I recommend Castor Oil! It does help, I have been using it for around 3 weeks and there is definite difference. Mind you, I do not have a problem with growing them, it's just the fact, I have always wished that they would be thicker and darker in colour.
HTH!
Deedah72, it's basically string hooped around the strand of hair and pulled to get a sharp precision, I think.