Men's Reactor 'Meltdown' dive watch features solid stainless steel construction as well as 200 meters of water resistant and a screw-down crown with a triple o-ring system which protects the watch even when the crown isn't screwed in. The extra large hands and markers are treated with superluminova for outstanding visibility. The bracelet is securely attached to the watch with an allen head screw bar system which is 5-7 times stronger than traditional spring bars. Model RE-72501