Material: Steel, zinc-plated. Pin and washer: Brass,
nickel-plated.

These hinges are used for doors which are flush with the frame on the
outside. The hinges are normally arranged to the side of the door.

Type D: The three-part, non-detachable hinges are to be mounted
inside, suitable for doors and covers, which must not be dismountable
from the outside.

Type Z: The two-part hinges are detachable, if the hinges are
identically arranged (all hinges mounted in the same direction).