Warning: Youd better disassemble the existing wand tilter in your blinds and make it compare with the size and shape of our tilters. If it has difference,please dont palce the order in order to save money for you. Because it will not match. Wand Tilter 2pcs for 2 Low rail Blinds Square Shaped Gear Hook Connection. Has a square shaped gear hole in the center (this means that the metal rod that is located inside of your blinds headrail must be square shaped in order to fit inside of the gear.) The square shaped gear hole in the center is 5/32inch (4mm) wide in diameter. For detail size ,please check the picture showing. Please check what shape of the metal rod located inside of your blinds headrail is before purchasing.