Keyestudio 4DOF Manual page 76

(3) Mount the grippers onto the claw servo plate.
 M3*12MM round-head screw *2
 M3 hex lock nut *2
 M3 flat washer *7
 Servo screw *1
①
 Claw servo plate
 Gripper plate
③
 Gripper plate
④
 Gripper Acrylic plate*1
②
⑤
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