Model 620CB has precision MT-5 adapter and diesel fuel injection nozzles for OD profile grinding on Tschudin Anglehead grinder. Device has sub-jaws and carbide ball nose shafts mounted on No. 15 taper sleeves. Carbide shafts run concentric to 1/10,000 TIR. Pull down inserts repeat to 1/10,000 TIR and grip nozzle/center base and pull nozzle seat onto nose shaft.