the base portion so that the panel lifting means 130 can be adjusted to accommodate panels of various thicknesses panel thicknesses can be for example 8 inches or 10 inches or the like the base portion is received through the bore of the tubular collar associated therewith a panel lifting plate 150 is attached to each base portion on the end thereof remote from the handgrip the lifting plates are rectangular and are attached at one end thereof to the base portions for rotation therewith each lifting plate has an inner surface 152 and an outer surface 154 the arm base portions are slidably and rotatably accommodated in the collar bores so that circumrotation of the handgrip portions rotates the lifting plates correspondingly about a center defined by the base portion and movement axially of the base portion retracts the lifting plates such movement is indicated in fig2 by arrows m and n respectively each base rod portion 142 can move axially thereof within the associated collar to move the lifting plate from a position wherein the inner surface 152 is flush with panel outer surface os as shown in fig2 to assist in the panel lifting process shown in fig3 and 4 to a position wherein plate outer surface 154 is essentially flush with the panel outer surface os and spaced therefrom as.