Without a nice clock in my garage, I'll usually stay up way too late and then have nightmares about all the parts I left out of my last project! This Racing Disc Brake Clock gets me to bed on time so I'm able to have even more fun the following day! It's easy to read and a massive 15.75" inches in diameter! Resembles the rotor and 8-pot caliper of the most sophisticated brakes made today. The integrated wall mount requires only one screw to hang. 1 AA battery required which I include.