Heavy-duty aluminum body with aircraft-grade hardened aluminum
Hard-anodized aircraft-grade shells prevent denting and scratching easily
Anodized inside and out for improved corrosion resistance 
Rugged, machined aluminum construction with knurled design 
Use American Luxeon 1w high power LED with long-life $ energy-saving
Lens made of non-breakable polycarbonate  
Wonderful professional optical reflector
Shock resistant
Anty-roller function
Waterproof
Skidproof
With black and natural aluminum color for each model