DELTA 17-935 Mortising Attachment For 11-980, DP300, 14-040, 14-070 and DP100 drill presses and 11-090 radial drill press Consists of fence bolted to drill press table Two hooked rods hold work against fence Offers 4-inch capacity under hold downs. 3/4-inch from ends of hook rods to fence Also fits drill presses with quill diameters of 66 mm, 50.8 mm, 48 mm and 38 mm. This includes Sears model 21313 and 21317 drill presses