Use Feather Professional Light blades if you have a light to average beard. A thin, flexible blade, it wraps around the shapes and curves of your face for a close shave. Mimics the performance of a 4/8" to 5/8" straight razor. Feather Professional Light Single-Edge Razor Blades are designed for use with the Feather Artist Club Maintenance-free straight razors. Feather's exacting standards guarantee a close professional shave every time. Dispense blades directly from their injector package, which is also equipped with a disposal chamber. Blade thickness: 0.25 mm Blade exposure: 1.2 mm Made in Japan