- 4″ inside diameter cast Iron 5/16″ diameter Ring with integral screw clamp
- Fitted with thumb-screw to accept rods from 5/16″ to 5/8″ dia
- Extension distance from center of rod to center of ring is approx. 4.75″
- Clamp from Boss head center line measures 6.5″ to edge of closed ring
- Rugged cast-iron construction
Cast iron closed Support Ring with inside diameter measuring 4″ with open boss head fitted with thumb-screw to accept rods from 5/16″ to 5/8″.






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