The Polysteel 600 exemplifies the ultimate flashlight for anyone who works or plays in rough-and-tough environments. The Polysteel 600 flashlight is designed for extreme durability, with Coast's trademark Pure Beam Focusing technology. It's unique from the inside out, as it comes with a tough, stainless steel core that's wrapped in a grip textured nylon polymer. This construction allows for the lights to withstand some of the toughest and most brutal environments and conditions, from plunges under water to drops from above. Using 4 X AA batteries, you will get a runtime up to 13 hours and 45 minutes on low. The lights Pure Beam Twist Focusing technology to ensure that not only will you have a light that is durable, but a light that maintains our advantage in beam quality as well with the Ultra View Flood & Bulls-Eye Spot Beams. With a maximum beam distance of 856 feet and 579 lumens, the Polysteel 600 combines durability with our focusing and beam technology. Tested and rated to ANSI/FL1 standards.