5x Valve Job Seat Cutter Set Carbide Tipped 2 Angle Cut For Performance Head Racing Kart, Clone, Predator, Hemi, Honda, Briggs, BSP Motorcycles Valve Seat Cutter Kit Carbide Tipped 2 Angle Cut As Original Seat Milling In The Following Sizes Valve seat cutters: 16 mm - 45 degree 18 mm - 45 degree 36 mm - 45 degree 20 mm 20 degree 23 mm 20 degree 45 Degree Cutters are Usable From Both Side As Other Side Is Grounded At 90 Degree.