Abstract: A device having a first, a second, a third, and a fourth slidably adjustable element arranged in a rectangular configuration, forming a rectangular pass-through opening approximately the size of a doorway and being slidably adjustable in a height dimension and a width dimension of the rectangle and having clamps for attaching the device to a doorframe so that the doorframe can be placed within a rough opening in a wall of a building while keeping a rectangular shape. The device has telescoping feet for adjusting the height off of the floor and leveling the frame. Once the frame is attached to the rough opening in the wall the clamps are released from the frame and the elements are contracted to allow the device to be removed from the frame, leaving the frame secured and properly aligned within the rough opening.