Cutters Unique HardMill / UT 4100 - cutters with flat face, for hardened materials Cutters Unique HardMill / UT 4200 - spherical cutters, application for hardened materials Cutters Unique HardMill / UT 4300 - radial milling cutters, application for hardened materials Cutters Unique Mill / UT 1200 - ball milling cutters, universal application Cutters Unique Mill / UT 1300 - radial cutters, universal application Cutters UniqueMill / UT 1100 - cutters with flat face, universal use