Oster Cryogen-X ™ heads are for professional use, interchangeable, in resharpenable stainless steel, for pet grooming Also suitable for other Oster, Moser, Aesculap, Wahl, Fuss-Dog and Andis clippers virtually all branded clippers that support quick release heads. Oster heads are anti-rust and anti-scratch. The "Ostercote" protective coating protects the blades. The teeth are made of steel and fine-grained carbon. The cutting teeth are machined for best results. The special "Ostercote" protective coating and the hardness of the blades (Rockwell 62) prolongs the life of the heads.
The indication "F" means that the cutting head has a "tight" tooth blade. The "F" heads are therefore particularly suitable for grooming animals with soft and very fine hair.