Sturdy and durable aluminum alloy material instead of plastic. A metal pocket clip design, allowing you to carry your penlight with you wherever you go. Push-button on/off switch, easy to control. The prefect tool for Medical Professionals OR companion for Hunting, Camping,Hiking, Traveling and light weight design makes this easy to carry around. This penlight is also a great buy for Nursing Students as they gain hands on experience working with and examining patients.