Why use Shear Magic Ceramic Blades?Efficient - Shear Magic blades sustain optimal cutting performance over longer periods of time.User Friendly - Shear Magic blades remain cool to the touch even with prolonged use.Economical - Shear Magic blades require less sharpening - saving both time and money.Hardy - Shear Magic ceramic cutters are resistant to rust - minimising blade corrosion.Versatile - Shear Magic blades are available in a range of different sizes to suit all needs.Universal - Shear Magic blades fit all professional Oster and compatible electric clippers.You can also update you existing metal blades by putting a ceramic top blade on your existing bottom blade. Just replace the steel cutter with a ceramic cutter and there you go - a ceramic blade set!!***Note*** Ceramic blades need to be resharpened in a different manner to normal blades. See pack for details of qualified service agents.Available in complete blade sets in the following sizes: size 10, 7, 7F, 5F, 4, 4F. (Blade set includes top ceramic blade and bottom metal blade)