The R221 ring from Sargent & Greenleaf is to be purchased in conjunction with the D300 dial. Together they are to suit the 6600 and 6700 lock series from Sargent & Greenleaf.
The R034 ring from Sargent & Greenleaf is to be purchased in conjunction with the D017 dial. Together they are to suit the 6600 and 6700 lock series from Sargent & Greenleaf.