The factory replacement sight blade kit, rear, 0.146 inches, blue outline, is engineered specifically for compatibility with Smith & Wesson K frame, L frame and N frame revolvers. This precision-manufactured component is crafted in the United States, ensuring adherence to stringent quality standards. The sight blade features a 0.146 inches height and a distinctive blue outline, facilitating enhanced target acquisition and accuracy. Designed for seamless integration, this kit serves as a direct replacement for the original rear sight blade, maintaining the firearm's performance and reliability.