The water feed chuck is suitable for diamond hollow drills with ½" threaded connection and fits all standard drilling machines with a 43 mm diameter collar (open-end spanner 24 mm).
Spare part for BO 79.300; however not suitable for BO 79.302, BO 79.303 and BO 79.304!
Application note:
The water feed chuck must never run dry. Risk of damage to the seals!