These retaining pins are part of the MotionAct Finger Changer system, which enables gripper finger changes through simple robot arm movements. These retaining pins engage the groove on the Finger Changer body to hold it in place. During removal, they provide a support point, allowing the Finger Changer to be disengaged through robot arm movement. The body is made from 303 stainless steel. The pin is made from quenched and tempered 440C stainless steel.