It provides hydraulic rock breaker’s tools to be able to operate at the piston axis and at the same time to be able to change without causing any damage to the main body of hydraulic rock breakers and extend the working life.

1) Tool bushing : It centers the tool of  hydraulic rock breakers and at the same time prevents bottom casting to take damage. Located between wear parts .

2) Inner bushing: It centers the tool to be able to operate  at the same axis of tool and piston of hydraulic rock breakers.

3) Thurst ring: It provides the operating of tool and piston at the same axis of hydraulic rock breakers and defines a specific operating range. Located between the wear parts.