Adjustable clamp hinges, as per below, come with a bolt that can be adjusted, as needed, for alignment and gate sag. The pivot part of the hinge is welded into the gate frame acting as part of the frame itself. The pivot moves inside of the clamp when the gate is open and closed. These hinges are welded in place and will carry weights from 220 lbs. per pair up to 570 lbs. per pair.