I used my sunrise tactical arm dope card over the weekend, this thing rocks. What a huge help it is. I put a blank white card in the top part, so when closed you can take a sharpie and write on the clear plastic. Put Target placements and dope for that yardage. When done take a alcohol pad ant wipe off the sharpie marks. Great piece of equipment. Then used index cards on the inside for my dope out to 100 yards.