API Safety Clamps 1)Certified by ISO9001 2)Fast drilling ... hammer union, drill pipe, drill collar, safety clamps, elevator, mud pump and stabilizers for water well, oil field, construction, geothermal, directional ... is for handling flush joint pipe and drill collar.2 API Standard3 Material:steel4 Type:WA-C,WA-T.5 WA ... know ,I will send the Competition price with Top-quality API Type WA-T Safety Clamps