This pistol light is precisely machined out of aluminum and hard anodized with a non-reflective surface, closely following the clean simplicity of the GLOCK pistol. It offers 600 lumens for bright illumination and 11,100 candelas for light concentration. It has temporary, constant, and strobe settings. The GTL II fits standard-frame GLOCK pistols with a GLOCK rail (Does not fit SLIMLINE^®).