Our Drill bits are come from CS brand and Kingdream Brand, which are the best famous brand in China and top 5 in the word, our drill bits has solded to more than 30 countries including USA and Russia with superior quality. - Product Specifications 1) Condition: 100% new 2) Manufacturer brand name: CS or Kingdream brand 3) The exact bit size: 8 1/2" = 215.9mm 4) IADC code: 127 Steel tooth Tricone Bit 5) Seal type: Elastomer Sealed Bearing 6) Bearing type: Journal Sealed bearing bit with gauge protection 7) Nozzle quantity and nozzle size:3 pcs 8) Connection joint Pin size: 4 1/2 API Reg pin 3-Available sizes: 60mm,65mm,76mm,93mm,95mm,98mm(3 7/8),101.6mm,114mm,118mm,120mm,127mm(5) 130.1mm(5 1/8),133.3mm(5 1/4),139.7mm(5 1/2),142.8mm(5 5/8),149.2mm(5 7/8) 152.4mm(6),155.5mm(6 1/8),158.7mm(6 1/4),161.9mm(6 3/8),165.1mm(6 1/2) 190.5mm(7 1/2),193.6mm(7 5/8),200.0mm(7 7/8) 212.7mm(8 3/8),215.9mm(8 1/2),222.2mm8 3/4) 241.3(9 1/2),244.4(9 5/8),250.8(9 7/8) 269.8(10 5/8),295.3(11 5/8) 311.1(12 1/4),346.0 (13 5/8),349.2(13 3/4) 374.6(14 3/4) 381(15),393.7(15 1/2),406.4(16) 444.5(17 1/2),508(20),558(22),609.6(24) 660.4(26) 4-Available models: Steel tooth (IADC) : 111, 121,131 117,124,126,127,136,137 211,311 216,217, 227 TCI (IADC): 415,435, 417,437 515,525,535,545, 517,527,537,547 615,625,635,,617,627,637,737 512,522,532,612,622,632,732
