Carmex Carbide Deep Groove Mill With Internal Coolant Bore - 2mmThe Carmex Carbide Deep Groove Mill with Internal Coolant Bore is a highrigidity, solid carbide grooving tool designed for engineers and machinists who need precise, deep internal grooves. Built for demanding metalworking tasks, it delivers dependable performance and efficient heat management. 6 spiral flutes: Provides smooth cutting and effective chip evacuation for long, deep grooves. Internal coolant bore: Delivers coolant directly to the cutting