Plate Special 2 x 2 with Pin on Bottom, Small Holes in Plate and Rotational Locking Fingers on Underside

Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Plate 2 x 2 Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges Brick 1 x 1 x 5 with Blocked Open or Hollow Stud Tile Special 2 x 2 with Top Pin Brick 1 x 2 Brick 1 x 6 with Bottom Tubes and 2 Lowered Cross Supports Plate 1 x 2 Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole Technic Brick 1 x 2 [1 Pin Hole] Technic Axle 12 Plate 1 x 4