Holbeins are fun. They are opaque, rather firm but with a very smooth feel to them. I can't say I use them much. They are more of an addition and I use the light shades of the vandyke brown and indian red for skin tones. I don't think there are different tips for them than other ops. They are a bit annoying because they aren't wrapped which dirties your hands a lot more and tends to get the sticks dirty. I know some people wrap them. I've toyed with the idea of using cigarette rolling paper to wrap them. Never tried it, though.