21x Small valve seat cutter set with carbide tip. 70°: 24mm, 28mm, 1 1/4. 45°: 1 3/16″, 1 3/8″, 1 7/16″, 1 1/2″, 1 1/4″, 1 5/16″, 18mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm. (4pcs) Valve Guide Rod: Size 4.5mm, 5mm, 5.5mm, 7mm. (4pcs) HSS Reamer: Size 4.5mm, 5mm, 5.5mm, 7mm. Cut out hard SEATS. Carbide valve seat cutter set 33 x. 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.