Valve Seat Reamer All Vehicle Model Comprehensive Manual Valve Seat Cutter Tool. Since engine valve seats are mostly made of high-hardness heat-resistant alloys, it has become increasingly difficult to repair the valve seats using traditional high-speed steel valve seat reamers, and the labor intensity of traditional development methods is also very heavy. The valve seat reamer is made of high-quality hard alloy teeth. The cutting edge is sharp, wear-resistant, and has excellent cutting performance for valve seat materials of various hardness. Abrasive tools made of superhard material diamond or cubic boron nitride can not only quickly remove the hard carbon layer on the surface of the valve seat, but also effectively grind the reamed working surface to achieve assembly accuracy. The two tools can be used together, with multiple functions, good performance, high efficiency, and long life. It is the most ideal valve seat repair tool at present.