MilaniEasy Brow Automatic Pencil - 02 Dark Brown

How does one sharpen this pencil?

What color for grey hair

I have dark brown hair, but want to avoid the harsh effects. Want to fill with light ash color. Will taupe work for this? Other color tips?

I wish to order milani easybrow auto pencil #03 natural taupe in a 3 pak. i'm having difficulty doing that?