Larryhup

I'm changing my front brakes for the first time since I bought it used. The two screws have a socket that measures 11.05mm flat to flat. The video I saw stated a 7mm hex socket and the auto zone pulled a caliper part for the 2015 from the shelf and it had a 7mm hex socket. Can anyone give be some background on the difference and what tool will work. 11mm hex keys are not standard. Although dealers never surprise me...... Larry