The Slammerhead is a 90 and the Sledgehammer is the monster 3 1/2" cutting 150 grain head.

I'm using the mesh for my bear bait hunting in my ASAT blind, but I'm leaving one open for my camera on the tripod. I'm careful to keep the windows behind me in reference to where I expect to see animals closed. Have someone else sit in your blind and move around with different window configurations and you'll get a good visual of what you can get away with in the field. Good hunting!