Safewaze D-Plate Anchor* For installation and use on steel surfaces, I beams or in fully cured concrete 3000 PSI or higher * Ideal for overhead or vertical surfaces, this anchor is a simple, reliable solution for a wide range of structural tie off needs. * Temporary or permanent installation * Suitable for horizontal lifelines (HLL) or material hauling * (4) 3 3 4 x 1 2 concrete wedge bolt fasteners included ** Meets all applicable standards for fall arrest when used