Grizzly H7789 Mortising Attachment Kit for Drill Presses New

The Grizzly H7789 Mortising Attachment Kit converts a compatible drill press into a mortising machine for cutting clean, accurate mortises in wood. It is designed for woodworkers who want to create traditional mortise-and-tenon joints without adding a separate dedicated machine.

This kit includes 1/4", 5/16", 3/8", and 1/2" chisels, along with interchangeable bushings to fit a wide range of drill press quill sizes. A cast-iron chisel holder and fence, hold-down assembly, and quill alignment pin help support precise, repeatable results during setup and use.

Ideal for hobbyists, furniture makers, and small shop users, it offers a practical way to expand the capabilities of an existing drill press. It is best suited for compatible full-size drill presses and is not recommended for baby, 8" drill presses, or radial drill presses.