This central bore, which is also equipped with female threads for customer-specific add-ons, can be used to supply material or as an ejector. It can also be used to monitor the handling or assembly process with a camera system or to pick up workpieces and center them using the sleeve during the gripping process. There are also threads integrated on the upper face of the gripper in addition to the threads on the cover plate, to facilitate mounting customer-specific add-ons. Available in 2 stroke lengths. 6 sizes from 64 to 200 are fitted with a multitooth guide.