Rifles Only Clear Cards can be to added to the Shooter's book or a stand alone product.
It is a place to put data cards or you can use a grease pen to write down information.
The clear card has a small strip of velcro on the back side to be able to attach to the shooters book velcro binding strips, or can be attached to anything velcro to hold on to.
Currently they come in Coyote Brown, Black, and OD Green.