Reporting question for Tuner - Hipshot, Enclosed Gear Classic, Nickel

Product:
Tuner - Hipshot, Enclosed Gear Classic, Nickel

Question:
I asked this question about 5 minutes ago and I never saw an answer. What is the true measurement of the flat side with the screw hole of one tuner that fits against the back of the headstock? The dimensions you have above in product measurements can't be right.