1. ISO 9001: 2008 2. Size: From any other regular size available from1.8"(45 mm)to 26"(660 mm) 3. Formation: Soft formation, soft to medium hard formation, medium hard formation, hard formation, very hard formation. We have different and suitable types 4. Delivery time: About two weeks, but still depending on the quantity of the order 5. Advantage: Stable productshigh quality and on time delivery Hejian Solidkey Petroleum Machinery is a professional supplier of drill bits used for oil filed, waterwell etc. Including tricone bits, PDC bits and drill bits. Various of model and dimension are available, they are in good condition and at reasonable price.Size Bit Type In. mm 6 152.4 136, 127, 216, 217 517G, , 537G, 617G, , 637G 6 1/2 165.1 126, 127 517G, 537G 8 1/2 215.9 114, 124, 126, 127, 217, 227 437GK, 447GK, 517G, 537G, 617GY, 627G, 637GY 9 1/2 241.3 126, 127 437G, 517G, 537G, 547G, 617GY 9 5/8 244.5 127 437G, 517G, 537G, 547G, 617GY 9 7/8 250.8 127 437G, 517G, 537G, 547G, 617GY 12 1/4 311.1 114, 126, 127, 216, 217, 227 437G, 517G, 537G, 617GY, 627G, 637GY 17 1/2 444.5 114, 117, 124, 126, 216 517G, 537G, 617GY, 627G, 637GY
