Having black hair but fairly light eyebrows, finding good brow products is hard. My go-to is the Etude House Drawing eye brow pencil. This $4 wonder is a fantastic tool to create natural looking filled-in brows. 

Other gray brown pencils I've tried in the past include the NYX auto eyebrow pencil, Marcelle eyebrow pencil, Estee Lauder (asian exclusive) eyebrow pencil. However, the Etude House one takes the crown as it's by far the cheapest, and the hard texture of the pencil makes it really easy to control and difficult to go overboard.

I use the shade 05 light gray. There are also various shades of brown as well as a darker gray available.

The pencil comes with the product on one side and a great little spooly on the other.

The shape of the pencil is actually very similar to the Hourglass Arch Brow Sculpting Pencil in the sense that it is triangular. So you can lay it down against the long side for a thin line, or swipe across for a thicker line to cover more area.

The colour is quite light but very easily build-able. I use this pencil every single day and have gone through about 4 or 5 of them already. I purchase mine from ebay a couple at a time and always have backups!

xoxo,

alixirs