This is a game changer for me. It is a pen style marker with an ultra fine brush tip that allows product to flow freely without tugging across the eye. I get such a sharp wing with this that people are commenting all the time on my liner. It lasts all day. Make sure to get the silver tube.
There's a heated debate at my in-laws on whether A1 or Heinz51 is better and I will go to my grave on the side of A1. It's a little spicy and plenty savory and I love it on steaks and almost always dip my patty melts in it.