parts for oilfield drilling and production machines, namely, quick connect assemblies, rope sockets, stems, mechanical drilling jars and hydraulic drilling jars, accelerators, crossover subs, knuckle joints, go devils, blind boxes, impression blocks, gauge cutters, tubing swages, two prong wireline grabs, tubing end locators, magnets, swab mandrels, bailers, pulling tools, adapters, running tools, lock set check tools, shifting tools, unlatch tools, unlatch heads, no blow tools, hanger subs, ...