Order a quantity of 1 in your shopping cart and receive 2 wall tilters., these wall tilters fit inside a headrail that is only 2.25 "wide and 1.5" tall, has a hexagon shaped gear hole in the center (This means that the metal rod that is located inside of your blinds headrail must be Hexagon Shaped in order to fit inside of the gear)., The hexagon shaped gear hole in the centre is 1/4 inch wide in diameter., See "How to replace Wall Tilt mechanism in the product description below.