Grooving External grooving GBA type Shallow grooving (Grooving depth: ~5 mm) Type KGBAS KGBA (-JCT) KGBS KGB Edge width (mm) 0.33 ~ 4.8 0.33 ~ 4.8 0.33 ~ 4.8 0.33 ~ 4.8Max. grooving depth (mm)0.8 ~ 5.00.8 ~ 5.00.8 ~ 5.00.8 ~ 5.0 G * These shallow groove types of the previous system will be switched to the system on the left. KGBS KGBAS KGB KGBA Ground chipbreaker Ground chipbreaker GM chipbreaker MY chipbreaker Full-R General (Square) Full-R (Round) GM chipbreaker MY chipbreaker Edge shape Deep grooving (Grooving depth : ~25 mm) Type KGHS KGH KGA Edge Width (mm) 4.0 ~ 8.0 4.0 ~ 12.0 3.0 ~ 5.0 Max. grooving depth (mm) 13 13 ~ 17 20 ~ 25 Ground chipbreaker Molded chipbreaker Molded chipbreaker G5