CARBIDE TIPPED VALVE SEAT CUTTER SET. HONDA CRF 250 R 2009 AND LATER MODELS. FAST & ECONOMICAL VALVE SEAT RESTORING SYSTEM. 45 degree angel cutters can be use from both sides Degree & Face. With HSS valve guide REAMERS (Extra long Helical flute). Kit consist of. 1 valve seat cutter 33 mm 45 deg. 1 valve seat cutter 27,5 mm 45 deg. 1 Flat cutter 33 mm 32 deg. 1 Flat cutter 28 mm 32 deg. 1 Interior cutter 37,5 mm 60 deg. 1 Interior cutter 30 mm 60 deg. Valve guide STEM & ARBOR. 1 pc 4.5 MM. Valve guide HSS reamers. We Do Make custom size valve seat cutters too.