- 6" Out side diameter cast Iron 5/16" diameter Ring with Boss Head clamp
- Boss head fitted with thumb-screw to accept rods from 5/16" to 5/8" dia
- Extension distance from boss head to ring is approx. 0.75"
- Inside Diameter of ring 5.375"
- Clamp from Boss head center line measures 7. 5" to edge of closed ring.
6" Out side diameter cast Iron 5/16" diameter Ring with Boss Head clamp , with open boss head fitted with thumb-screw to accept rods from 5/16" to 5/8" dia. Extension distance from boss head to ring is approx. 0.75", Inside Diameter of ring 5.375" Clamp from Boss head center line measures 7. 5" to edge of closed ring.