Shop Fox Mortising Attachment Kit D4031. Bushing sizes include: 2.945" OD x 2.600" ID 2.600" OD x 2.366" ID 2.366" OD x 2.170" ID 2.600" OD x 2.000" ID 2.600" OD x 1.880" ID and 2.600" OD x 1.570" ID. Just match your drill press quill diameter to the...