Soss invisible hinges are designed for installation in wood, metal and plastic doors or windows, thereby facilitating limited movement and a completely concealed look. These hinges are made of high-strength steel and heavy-duty zinc alloy casting for excellent strength and durability. They feature a non-removable steel pin for connecting the pivoting hinge arms and can be fully mortised for applications in furniture, cabinets, door & window panels. Choose from a wide range of these invisible hinges compatible for use with door thicknesses ranging from 11/16 to 2 inches on Raptor Supplies.