The DeerView Hinged window is a very popular and economical window system built to fit most deer blinds. This window system is made from a fully weather-stripped aluminum frame with double strength marine glazed glass. The DeerView hinged blind window will protect your blind interior from unwanted pests and serve as a great wind block. The DeerView Hinged Window allows access to the entire opening when in the open position. It can be mounted in three (3) different positions depending on your particular stand. This window can flip up and out of the way, locking in the up position with the use of the thumb latch (included). This window can also flip down and lock out of the way with the use of thumb latch. This window also can be mounted vertically making it a great choice for bow hunting where a longer top to bottom mount is more desirable. What to cut my rough opening? We recommend cutting the window opening 1” smaller on the height, and 1” smaller on the width for each desired window size. I.E. For the 12” x 12” Hinge Window, recommended rough opening of 11” x 11”. Available in clear glass, gray glass or clear glass with camo mesh covering. NOTE: This window has a small metal frame with hinge tabs at the top corners. Two metal brackets (included) attach over the tabs allowing the window to mount and swing open. This window is not a 2 piece window with a window and separate frame.