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.

• 3135c01 Slope Brick 45° 2 x 3 x 1 & 1/3 Double with Arm and Black Hook this part is a sub-part of it
• 3135c02 Slope Brick 45° 2 x 3 x 1 & 1/3 Double with Arm and Light Gray Hook crane this part is a sub-part of it
• 3135c03 Slope Brick 45° 2 x 3 x 1 & 1/3 Double with Arm and Blue Hook this part is a sub-part of it
• 3135c04 Slope Brick 45° 2 x 3 x 1 & 1/3 Double with Arm and Red Tow Hook this part is a sub-part of it
• 3136 Hook, Tow Hook with 2 Studs on Both Sides this part is a pair of it