This portable/reusable anchorage connector is designed to be used in concrete with compression strength equal to or greater than 3,000 lbs. When inserted into a properly sized, cured concrete hole, it becomes a safe anchor point for a single user. (Please note: For easier anchor reusability, it is very important to clean the concrete dust from the hole after drilling). The Miller Grip™ can be removed and re-installed in a new location, and is constructed of stainless steel, aluminum and other non-corrosive materials for a longer service life.