Surefire M6LT Guardian Extended-Range LED Flashlight 2011 Model (900 Lumens) ... Virtually indestructible LED emitter regulated to maximize output and runtime Large Turbohead TIR lens produces tight, extended reach beam Coated, tempered window resists impact and thermal shock, maximizes light transmission Deep machined grooves in body provide secure hold in all conditions High-strength aerospace aluminum body, Mil-Spec hard anodized for extreme durability