Maglite 4 D-Cell Flashlight: * Diamond knurl design * High-intensity light beam * 1/2 turn, cam action focus, spot-to-flood * Self-cleaning rotary switch, 3 position: on, off, and signal (manual, momentary on-off) * Spare lamp safely secured in the tail cap * High-strength aluminum alloy cases * O-ring sealed for water resistance * Shock resistant * Anodized inside and out for improved corrosion resistance * Individually serial numbered