Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 792c01 Arm Holder Brick 2 x 2 without Hole and 1 Arm this part is a alternate of it
• 792 Brick 2 x 2 Arm Holder Lower Part Sub-part of this part
• 793 Brick 2 x 2 Arm Holder Upper Part with Hole Sub-part of this part
• 795 Arm Piece with Disk and 2 Fingers Sub-part of this part