4" x 6" (101 x 151mm) DPBW Projection Hinge

 4" x 6" (101 x 151mm) Solid Brass Double Phosphor Bronze Washered Projection Hinge (pair)

The extra width of the leaf and subsequent positioning of fixing points near the outer edge allows the door to open around projecting architrave or obstacles enabling the door to open to 180 degrees.