Andersen&reg; #7191-32 Sash Lock & Keeper (Left Hand) in White (1974 to 1995) Works with Primed Wood Casement Windows manufactured 1974 to 1980. Works with Perma-Shield Casement Windows manufactured 1979 to 1995. Works with Perma-Shield Awning Windows manufactured 1981 to 1995. This Amerock sash lock is for a left hand unit A left hand unit will have the sash lock on the left side as viewed from the interior of your home.