... structure design ensures high efficiency Characteristics of excavator clamshell bucket :The clamshell can be opened and closed directly by ... Q345B, it can resist grinding and bending. 2. Strong digging strength.3. Especially good for a restricted working space. ... PC200, PC300, and PC400 CAT170, CAT110, CAT200, CAT240, CAT320, and CAT330 EX60, EX100, EX200, EX220, EX230, EX240, EX330, and EX360SK60, ...