rod of a well 39 s rod string with sufficient force to suspend the string from the wellhead the assembly comprises an annular body forming opposed radial internally threaded side openings extending from its outer circumferential surface to its central vertical bore an externally threaded locking member is positioned in each side opening and protrudes externally the locking members can be manually threaded inwardly to engage the polished rod an external leverage assembly is anchored to the body and engages one of the locking members this leverage assembly can be manually turned to tighten the locking member against the polished rod with powerful axial force to provide enhanced gripping application_number US 5204002 A description one embodiment of the prl assembly 1 is illustrated in fig4 7 8 and 9 this prl assembly 1 comprises a body means 2 having a vertical central bore 3 extending therethrough the prl assembly 1 forms part of the bottom connection 31 of an integral production pumping tree 4 the bottom connection 31 is adapted to mate and connect with the top connection 5 of a wellhead tubing head 6 the prl assembly bore 3 forms part of the vertical internal bore 67 of the wellhead 7 through.