Using these adjustable spreader beams is easy. First, attach the upper bail to your lifting equipment. Then, adjust the lower bails in 4 - foot increments according to the size of your uneven load. Slide the bails between the C - Channels to get the right position. Make sure the load is properly balanced on the bails. When using, always check if the spreader beams meet the ASME B30.20 - 1993 standard. Polyester lifting slings need to be bought separately and attached correctly. For maintenance, keep the beams clean. If there are any signs of wear on the powder - coated finish, have it recoated. Additional bails and hardware can be bought if needed, but always make sure they are compatible with your spreader beams.