Our Diamond Burnishing Inserts are made from the highest quality of monocrystall diamonds. All diamond insets are grinded, polishied to correct geometry. We do use extra lagre and thick MCD material that are laser cut into our needs. In the beginning back in 1965 we made this tools with natural diamonds, But due to all advancies the MCD gives both for enviroment and our end-users alla our diamond inserts are possible to relapp or regringd. This give even more out of your investment.