BioLogic BioRock All Natural Mineral Rock: * Contains over 50 trace minerals that are great for getting deer in front of your camera * Minerals play a role in a whitetail"s health, body dimensions and antler size and the BioRock delivers a readily available mix of all natural minerals * Many of the minerals are vital to antler growth and overall health like calcium, phosphorus, magnesium and sulfur * Simply place BioRock out on a stump or a level, well-drained surface near an area of high deer traffic and let it work its magic * Perfect for hunting, observation for trail cameras or helping your herd reach their maximum health and antler growth