The M10 is a member of Pelican's Black Knight™ Series, an innovative range of hi-tech flashlights for use by professionals. M10 Alkaline 4C is 11-1/4" (28.6 cm) in length and equipped with a handy on/off intermittent switch. The M10 is made of chemical resistant, unbreakable material with a thermo plastic rubber grip. The lens is made of a high temperature nylon lens protected by a thermoplastic rubber shroud. The sure grip sheath and head are made of thermoplastic rubber to resist chemicals and perspiration. Its bright pre-focused Xenon laser spot beam penetrates fog and smoke. It also includes a safety battery tray with 4C cell alkaline batteries (not included) in order to avoid accidents in case that cells are inverted. It is water resistant (not for diving applications). You break it, we replace it... forever.