... union, drill pipe, drill collar, safety clamps, elevator, mud pump and stabilizers for water well, oil field, construction, ... and drill collar. there are two kinds of model of safety clamps. Model WA-C Safety clamps ... handling flush joint pipe and drill collar.2 API Standard3 Material:steel4 Type:WA-C,WA-T ... will send the Competition price with Top-quality supply high quality WA-C & WA-T Safety Clamps