Mortising Attachment comes with four popular mortising chisel and
bit sets plus a handy carrying case that holds everything for easy
storage. Offers large 4" capacity under hold-downs;
2-3/4" from ends of hood rods to fence. Fits 10", 12", 13",
16-1/2", 17" and 20" Drill Presses. Also fits drill presses
with quill diameters of 66mm, 50.8mm, 48mm and 38mm. This
includes Sears Model 21313 and 21317 Drill Presses.