the interior of the housing nut the shear stud 25 being adapted for threaded engagement with a tension mandrel not shown forming a part of the wireline tool in turn an equalizer body 50 at the lower end of the tubular support 16 is provided with an enlarged end or shoulder 26 for engagement by a standard form of setting sleeve which forms a part of the wireline tool as a preliminary to a more detailed description of the present invention it is important to recognize that the assembly and interconnection between the inner mandrel 12 and outer tubular support 16 permits the application of force by the tension mandrel in an upward direction as designated by the arrow m and a simultaneous downward force by the setting sleeve against the shoulder 26 in the direction of the arrow s in assembled relation the outer tubular support 16 is releasably interconnected to the inner mandrel by upper shear screws 28 which extend radially inwardly through the wall of the tubular support 16 into an aligned bore of limited depth formed in the external surface of the upper end of the upper mandrel section 12 release pins or retrieval lugs 29 are disposed in diametrically opposed relation to one another in the wall of the tubular support beneath the upper shear screws 28 and project radially outwardly from the surface of the tubular support for engagement by a retrieval tool 30 as illustrated in fig6 and.