Logan Studio Joiner Vise Clamp is used to clamp frame corners for gluing. Use with the F300-1 Studio Joiner to speed up the process of picture frame joining by pre-gluing 2 corners instead of one, reducing assembly time by 50%. The Studio Joiner Vise Clamp comes fully assembled with instruction sheet. Includes a quick adjust clamp. Use on mouldings up to 2½" wide.