Allows routers with smaller rod centres and rod diameters to be fitted to the Combination Router Base.
Allows router to be moved more central to base aperture.
Easier initial set up and allows different makes and models of router to be used.
Rod diameter 7mm and rod centres from 60.3mm to 174mm.

Specification:
Diameter=7 mm
Rod centres=60.3 mm to 174 mm
Length=220 mm excl. thread