to the weight and motion demands made on the hinges by heavy windows. To ensure maximum carrying capacity, all Magnum Hinges are constructed of stainless steel and solid brass...Magnum Hinges - About Us - Commercial Window Hinges by Advantage... ABOUT Magnum Hinges is a division of Advantage Manufacturing Corp. We specialize in producing a full-line... of heavy-duty, four-bar hinges designed to provide the high load-bearing capacity needed for aluminum casement and projection windows. Advantage Manufacturing is headquartered in Victor...