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.

• 2433 Hinge Bar with 3 Fingers and End Stud (Control Lever) this part is a pair of it
• 2452 Hinge Plate 1 x 2 with 3 Fingers On Side this part is a pair of it
• 4275b Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs] Pair of this part