embodiment and should not be interpreted as defining or limiting the range of values or properties of exemplary embodiments within the scope of this invention the relative dimensions and size of the jet pump assembly may be reduced or exaggerated for clarity like numerals are used for like and corresponding parts of the various drawings fig3 is a schematic view of an edm tool 100 operable on a jet pump beam bolt in accordance with an exemplary embodiment of the invention it is appreciated that the portion of the jet pump assembly 34 shown in fig3 is similar to fig2 and will not be described in detail referring to fig3 the jet pump beams 86 are attached to the inlet mixer 41 a retainer plate 52 for supporting the jet pump beams 86 is attached below the beams 86 the plate 52 includes an opening which aligns with an opening on a block 49 once aligned a retainer bolt 90 may be inserted for fastening the retainer plate 52 to the inlet mixer 41 the retainer bolt 90 may include tack welds 91 for reinforcing the retainer bolt 90 the tack welds 91 are secured to the retainer plate 52 in a conventional manner using known welding processes the edm tool 100 engages the retainer bolt 90 the tool 100 is generally elongated or linear in shape so as to engage the retainer bolt 90 due to the design and operability of the tool 100 the edm tool 100 may easily maneuver around the area of the jet pump assembly 34 the tool 100 includes a bolt housing 110 for engaging or indexing off a surface of the bolt head 90 in an example the surface of the bolt head 90 may be hexagonal and thus.