Enjoy our Casement Window Hardware on your windows so you can let the good air in and the bad air out. Casement Windows are generally attached to the sides of the window frame and open with a handle. This makes them an ideal choice for kitchens where double-hung windows could be difficult to open and close. Parts include an assortment of keepers & strikes, handles, operators, locks and latches. At Window Door Parts, we carry a large variety of replacement casement window parts to keep your casement windows safe and energy efficient for your home.