Ring inserts for Craftsman Router Table (Model No. 171.25443).

Rings snap into position for a secure fit, flush with table surface. 

Ring openings range from 5mm to 40mm with 5mm increments, and with the opening diameter debossed on the top surface of the plate. 

The included f3d file is designed parametrically to adjust for other table styles, or for customizing the opening diameter (Note: Updating the opening_diam_mm parameter will update both the opening size, and the debossed text).