... Yes. All our activities are certificated by ISO and API, we have many regular customers in many countries and ... 3/4”)374.6mm(14 3/4”)381mm(15”),393.7m(15 1/2”),406.4mm(16”)444.5mm(17 1/2 ... ”),508mm(20”),558mm(22”),609.6mm(24”)660.4mm(26”)Available models: Steel tooth(IADC ... )111, 121,131117,124,126,127,136,137 216,217, 227211,311TCI(IADC)415,435, ...