FOR A TRUE KITCHEN PASS THRU WINDOW WITH NO TRACKING., TRY A FLIP OUT WINDOW. IT COMES AS A RETROFIT OR A NEW NAIL FLANGE. WITH GAS STRUTS, JUST UNLOCK ON THE INSIDE & GIVE A GENTLE PUSH. IT THEN OPENS AND LOCKS IN PLACE. IT IS THAT EASY TO BRING YOUR INDOORS TO THE OUTDOORS. BELLY UP TO THE BAR FOR A DRINK OR SNACK & JOIN THE KITCHEN CONVERSATION. NOT TO MENTION, DOING THE DISHES WITH THIS BREEZE & VIEW IS NO LONGER PUT OFF TILL LATER.