There is hook velcro sewn on the back of the shotgun cards. Made for 12gauge shotgun shells only. The "Add Sticky Back Loop Velcro for $1.50" option is a strip of industrial strength loop velcro with industrial strength adhesive. Choose this option if you would like to attach the shotgun card to your shotguns receiver. Please let the velcro adhere for 24 hours to let the adhesive take a set.
Sizing: 4.5" long x 2"wide
Black,CoyoteBrown,RangerGreen,Foliage color is mil spec Elastic.
Muliticam color is printed mil spec Elastic.
ODGreen,WolfGrey color is commerical Elastic.