HJC-380L… Pair of Bronze Plated Through the Door Pivot Hinges. Opens 270 degrees with 5/8″ Thick Door. Opens 255 degreees with 3/4″ Thick Door. Extra Heavy Steel for Heavy Doors. Semi invisible, only the tip shows. Cut an angled 7/32″ slot through the door. Paired left and rights. A replacement for some NICO hinges.