This handle is a black Internal style latching patio door handle found on Viking as well as a variety of other patio door manufacturers. The most common internal style latch. The handle body is diecast steel with a wood handle attached. Included is a matching outside handle and keeper. The mounting holes are 3-15/16 in. on center. When the latch is installed into the door frame through an inside access hole, the connected lever is held in place by a flat spring as it operates the latch up and down to engage the keeper.