Made of Japanese high-carbon steel, heat treatment and ice tempered to keep the blade sharper longer. Rust resistant and durable. Cool running and extra sharp. Rockwell hardness rating of 62. Compatible with Oster, Andis, Conair, Wahl, Laube, Thrive, and most other clippers with snap on blades. Bucchelli wide blades offer both the professional and home groomers a safe and easy way to reduce shave-down times by up to 50%. These blades fit all professional models of A5 clippers. Additional Details ------------------------------ Product description: Made of Japanese high-carbon steel, heat treatment and ice tempered to keep the blade sharper longer. Rust resistant and durable. Cool running and extra sharp. Rockwell hardness rating of 62. Compatible with Oster, Andis, Conair, Wahl, Laube, Thrive, and most other clippers with snap on blades. Bucchelli wide blades offer both the professional and home groomers a safe and easy way to reduce shave-down times by up to 50%. These blades fit all professional models of A5 clippers.