The tool itself has a grinding head. If you are skilled, it will not leak if it is not ground. Very convenient. Grinding head specifications.
Large Car Valve Seat Reamer Valve Grinding Tool Engine Valve Seat lapper Q-15M
Grinding Tool Engine Valve Seat lapper Q-15M Large Car Valve Seat Reamer Valve
12x Large Carbide Mounted Valve Seat Cutter Set 30 45 70 (20 Degrees) USA TOOLS
Large Carbide Mounted Valve Seat Cutter Set 30 45 70 (20 Degrees) RAHISHTOOLS
Large Carbide Mounted Valve Seat Cutter Set 30 45 70 (20 Degrees) ACTOOLS
Large Carbide Mounted Valve Seat Cutter Set 30 45 70 (20 Degrees) USA RSTOOLS
