12x Large Carbide Mounted Valve Seat Cutter Set 30 45 70 (20 Degrees) USA. 12x Large Carbide Mounted Valve Seat Cutter. 70°: 1 1/4″, 1 13-16″, 1 3/8. 45°: 1 1/4″, 1 3/16″, 1 5/16″, 1 5/8″, 1 7/16″, 1 1/2″, 1 3/4″, 1 7/8″. (8 pieces) valve guide rod : size 7mm, 8mm, 8.5mm, 9mm, 10mm, 7/16″, 11/32″, 5/16. Cut out hard SEATS. Carbide tipped valve seat cutter set 23x. All pilots are soft and centered on both ends to reduce the OD a bit. This item is made of high quality carbon steel. Each cutter is rated for best results. Ideal for the Classic Car or Old Engine Restorer. Best Use for All Classic Cars, Jeeps, Tractors, Trucks, Motorcycles & Jeeps, Vintage Morris, Mini, Mercedes, Perkins P-6, Leyland. These valve seat cutters are made of hard steel, properly hardened and tempered. Each cutter is of precise quality for best results. This is a must for classic cars, motorcycles, jeeps, tractors and trucks.