The roller on the inside is good for my 22mm short hair (even when 3 to 4 cm). On the rating, or it's shorter, it's going well, but of course we can not "wrap" around the brush, just give a little volume. The pins, it is now is what that grabs the hair as a true round brush to blow dry boar bristle, probably not, but I think none will be better on this side. Retracting the pins is easy. I have a little hand, and everything is in the right place for it moi.La same brush is very light, and discrete color. I did not need 36 accessories, just a brush. So I guard. Very happy.