Carmex Carbide Groove Mill With Internal Coolant - 16mm x 1.7mmMeet the Carmex Carbide Groove Mill with Internal Coolanta precision grooving tool built for machinists who demand clean, reliable grooves in internal and external profiles. With solid carbide construction and integrated coolant, this mill is designed to perform consistently across a variety of materials. Size: 16 mm diameter x 1. 7 mm Material: Solid carbide for exceptional rigidity, wear resistance, and long tool life Internal coolant: Integrated