API Safety Clamps 1)Certified by ISO9001 2)Fast drilling rate 3)Strong cutting structure durability 4)Different sizes Company ... hammer union, drill pipe, drill collar, safety clamps, elevator, mud pump and stabilizers for water well, oil field, construction, geothermal, directional boring ... clamps1 It is for handling flush joint pipe and drill collar.2 API Standard3 Material:steel4 Type:WA-C,WA-T ...