top to receive the assembling screw 28 which anchors the covering shell when installed on the base fig6 is a top left perspective view of the molded covering shell 12 separated from the base 11 with its embodiments it is molded of high impact plastic to the exact size and shape determined by consulting with experts in the anatomy of the hand the bottom edge of the covering shell 12 conforms to the exact size and shape of the stepledge 23 and vertical tab 22 onto which it rests when installed the covering shell 12 contains a screw hole in the top 27 that aligns with the threaded hole 26 in the top of the base pillar 21 through which the assembling screw 28 is installed four finger pads 15 are molded into the appropriate side of the covering shell 12 so that all of the material is removed from the vertical lines of separation 29 completely separating the finger pads 15 only part of the material is omitted from the horizontal line of separation 30 above the finger pads 15 leaving a plastic hinge at the top of each finger pad 15 and leaving them attached to the covering shell 12 a u shaped slot not shown at the bottom rear of the covering shell 12 to fit over the serial patch cord which exits from the base 11 through the slot 25 in the back of the shortwall 24 fig7 is a sectional view across the length of the assembled invention on line 7 u2014 7 of fig2 it illustrates the installed covering shell 12 the base 11 the threaded hole 26 in the base pillar 12 an on off microswitch 19 installed on.