Valve Seat Single Plane Cutting Tools Universal Boring Cutter Valve Repair Tools. Number of pieces: 28. Suitable for: Diameter 22-63mm valve. Cutter Blade Angle: 15°, 30°, 45°, 55°, 60°, 75°, 90°. Tool bar diameter: 5MM, 5.5MM, 6MM, 7MM, 8MM, 9MM, 9.5MM, 10MM, 10.5MM, 11MM, 12MM. 14 x Cutter Blade. 11 x Cutter arbor.