WAHL Professional Animal Competition Series Blade #4 is a 8mm (5/16) cut Length; skip extra coarse Professional quality chrome finish provides superior rust and corrosion protection Designed to provide a smooth cut and a show quality finish Fits Wahl KM2, KM5, KM10, KM cordless, powergrip, SS Pro, stable Pro plus and Oster and Andis detachable style clippers 100% quality Guaranteed to cut fur The first time they are used; Made in the USA of imported and Domestic parts