This attachment is designed for use with Mortising Chisels and bits on your drill press to cut mortises (square holes) for vairous mortise and tenon joints. This has bushings for use on Delta 12", 14" 15" and 16 1/2" drill presses and 32" radial drill press Capacity under holddown: 2 3/4" (70mm) Capacity ends of hooked rods to fence: 2 3/4" (70mm) This unit is being sold "As-Is", the box is rough, but the attachments are in sound working order. Shipping weight on this is 10 lbs, item can be picked up in zip code 80643 to reduce cost.