Casio G-Shock Heavy Duty GA 900 4AER watch driven by a 5-lobe head

driven by a 5-lobe head so that the driver (included with the watch) can't slip or climb out

while the screw-down stainless-steel case back reinforces durability

316L stainless steel case with a water tight

the Master Carbon SEAL Automatic is equipped with the Luminox Light Technology

Casio G-Shock Heavy Duty GA 900 4AER watch driven by a 5-lobe headIntroducing Casio's lineup of heavy duty models that are great for wearing in tough environments and as well as fashion statements in their own right. The Casio GA 900 4AER model is supplied with with a red case and band. The industrial design of this models is created by a 10 sided bezel that resembles the shape of a nut. The bezel is secured by four screws for a tough and rugged look. Combination timekeeping is provided by analog hands along with a