This product is the valve seat cutter and boring Cutters. Model:Single Plane. Cutter Blade Angle: 15°, 30°, 45°, 55°, 60°, 75°, 90°. 14 x Cutter Blade. 11 x Cutter arbor. Type:Valve Seat. High-Quality: This valve cutting tool is made of high-quality materials, ensuring long-lasting durability and superior performance.