The patented Acme Lull & Porter hinge is used in applications when enough wood trim is exposed within the window opening to mount the shutters. One side of the hinge is mortised into the edge of the shutter and the other side is mortised into the window casement. When using Acme Lull & Porter mortised hinges, choose a hinge that gives you the best clearance away from the window casement. Be sure to allow adequate clearance from the surface of the house for ventilating purposes. Minimum sold is one set; Set is One Left and One Right also available (shown below) is the the Three Part Shutter Fastener. See Price List & Ordering page for pricing & contact information.