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I once on the bulb screwed which goes all the screws, and I have to say that I'm still excited. The housing is made entirely of metal (presumably ALU). The front 'glass' is made of plastic (has a fail-safe) and could, if required (for example, very important to be scratched) itself to be replaced (a planar, circular plate of estimated 1-2mm). The focusing of LEDs is an extra plate held with three Spring springs in position. When focusing, the distance of the plate to the LEDs changed (way ca.4mm). This mechanism is so awesome and a rugged design that nothing can go wrong. The threads of the battery compartment is provided with a gasket (O-ring). The 'glass' is provided with a sealing ring. The A / the OFF button is covered by a 'Gummi' membrane and protected at least against spray. I (with its seal) and the electronic unit underneath could not take a closer look at the A / the OFF button, you would have three riveting addition to the LEDs drill I did not want to make the bath test.
CONCLUSION: very nice and accurately processed, and robust flashlight made me confident in terms of brightness FULL. I could no predetermined breaking point (Find businesses often build a (small) vulnerability, where the product sooner or later breaks, and thus, for example, is useless, in most Bürotackern the Joint Staff of the spring for the staples of plastics, even if the rest of the tacker from metal).