These stainless steel, double-edge blades are specifically made to the dimensions of the Henson AL13. RK Shaving double-edged blades have an extremely high quality of manufacturing with consistent performance and sharpness that performs well when paired with the Henson AL13 (or Ti22). A 100-pack of blades should last the typical shaver 2-3 years.
This blade will work in all double-edged safety razors.