"Heavy-Duty Industrial Flashlight is extra-tough with a chemical, grease and impact-resistant polypropylene case. Features a nonmoving internal switch system, self-cleaning external switch system, Shatterproof K-resin lens and a large switch that is easy to operate even with gloved hands. Has a ribbed non-slip grip, non-roll barrel design with non-conductive hanger ring. Uses D size batteries, not included. "