With a strong 1000 lumen beam that can reach up to 245m, the Streamlight TLR-1 High Lumen Weapon Light provides superior illumination for all of your tactical missions. These Gun Mounted Flashlights by Streamlight securely attach and detach to your Glock and Picatinny style rails with a clamp system without tools in a safe and quick manner, and can fit existing light bearing holsters for versatility. The Streamlight TLR-1 HL Rail Mounted Tactical Weapon Light has an ambidextrous momentary/steady on/off switch, and the user programmable strobe can be enabled and disabled based on your lighting needs. For a high power weapon light in a compact, durable package, the Streamlight TLR-1 HL 1000 Lumen Handgun Light is the perfect choice!