The casement sash stay. At one time, prior to the advent of crank operated window hardware, casement stays were utilized to hold a window sash in place. Common types included telescoping friction stays, sliding stays, rod stays and English pin type stays. Casement stays add a touch of traditional feel to windows and can be utilized with push-out casement windows as produced by Marvin. Quality casement stays are produced by Phelps Company and Whitechapel LTD.