This high-performance upgrade switch is compatbile for Streamlight TLR1 series lights, enhancing control, grip, and overall ergonomics. Engineered to promote optimal hand placement, it features refined serrations and carefully angled surfaces for intuitive, natural activation under stress. The durable yet lightweight construction maintains compatibility with most holsters. Made in the USA, this drop-in kit installs easily as a direct replacement for the factory switch, allowing you to retain full control while activating the light. The standard selection is extended and added texture. The momentary on only selection WILL NOT allow constant on of the flashlight and only allow momentary light on while the switch is selected. The switch is compatible with Streamlight TLR-1, TLR-1 HP, TLR-1 S, TLR-1 HL, TLR-1 HLP, TLR-2, TLR-2 S, TLR-2 G, TLR-2 HL, TLR-2 HL G, TLR-2 IRW, TLR-VIR Pistol, and TLR-VIR II models (not compatible with TLR-1 HLX).