the base member front surface area the distance between the end slots is equal to the distance between the right and left side threaded screw attachment receptacle holes 32 located in the quick change table platform work surface 31 these slots extend through the base members from top to bottom surfaces through these slots extend the tightening bolts with turn knobs 90a and 90b in each base member top surface at the perimeter of the center bit clearance cavity are located attaching screws 92 which are provided for securing of optional protector shield not shown and saw dust vacuum system attachment not shown attached to the front surface 73a and 73b of each base member are laterally adjustable front workpiece guide plates 74a and 74b each guide plate has a flat front surface 79 which extends vertically upward beyond the top surface of and at a 90 relation to the base member the length of each guide plate is such that they extend beyond the length of each base member front surface 73a and 73b but limited to a distance of 11 4 34 on either end recessed into the flat front surface of each guide plate 79 are elongated horizontal grooves 76 through the center of which are located elongated slots 77 which traverse the length of each groove the guide plates are secured to the base members by means of tightening screws 78 which pass through the groove slots and are received into the threaded receptacles 80 which are located in the base member front surface the width and depth of each guide plate groove is sufficient as to allow the head of the tightening screws to recess into the groove and below the front surface of the guide plate the biscuit.