All of Oster® blades are put through a 12 step process guaranteeing quality and craftsmanship. They start with a fine-grain carbon steel that is heat treated to create a hard surface for greater wear resistance, leveraging a Rockwell Hardness Rating of 62. The patented Cryogen-X™process takes the blades down to a -300 degrees for a deep freeze, producing a harder, sharper blade which extends the product life. Each blade is then hand lapped for a smooth cut finish.
Size 40 detachable pet clipper blade cuts hair to 1/100 inch (0.25mm)
Fits Oster A6, Golden A5, Turbo A5, Power Max, and PowerPro Ultra Clippers
Designed for extremely close clipper work on animals
Heat treated to more than 1,000 degrees F for added toughness and strength