Ca n't a check peg in a attack hole ? . a unaccustomed one ! . The Delta 17-924 Mortising Attachment to your dress press and turns it into a mortising machine. four common mortising chisel and bit sets and accessible carrying case along with attachment. it with Delta models 11-980, 11-990, 14-070 & 17-900 drill presses and 11-090 radial tire drill press ; and Sears model 21313, 21315 & 21317 drill presses.