Low-mass titanium striker indicator is about 40% lighter than the factory steel part, for faster lock time and a crisper trigger pull in a 9mm/.40 caliber XD/XDM pistol. Included reduced-power striker spring and rebound spring helps ensure consistent primer ignition. Works with factory trigger components and Powder River trigger kit. Mfg: Powder River Precision Inc SPECS: Titanium, with steel spring. Fits 9mm and .40 S&W Springfield XD and XDM pistols.