Lifting Eyes are used for lifting ProLine modular frames and for fastening ProLine top accessories to the frame. Lifting eyes thread into corner blocks in a frame. Furnished in sets of four, Lifting Eyes are designed for overhead lifting in conjunction with shackles and a spreader bar. Use of shackles instead of hooks is preferred. The angle between the top of the enclosure and the cable or chain must be at least 45. Use only slings and spreader bars that are designed for the specific application and are in compliance with regulations established by OSHA, ASME, ISA, ASTM and other governing agencies.