Carbide Tipped Valve Seat Cutters Set 24 Pcs. Big block Diesel and Petrol Engines. Contents :- (12 pcs cutters). 1 7/8 – 30 Degree. 1 1/47 0 Degree. 1 1/27 0 Degree. 1 3/4 7 0 Degree. (4pcs) Stems metric size 7 mm, 8 mm, 8.5 mm, 9 mm. (4pcs)Stems inch size 11/32″, 3/8″, 5/16″, 7/16″.