Image Item No. Description  3700  Technic, Brick 1 x 2 with Hole Catalog: Parts: Technic, Brick  47431  Technic, Brick Modified 2 x 2 with Axle Hole, Rotation Joint Ball Half Vertical, and Fist Catalog: Parts: Technic, Brick  47452  Technic, Brick Modified 2 x 2 with Pin Hole, Rotation Joint Ball Half Horizontal, and Rotation Joint Socket Catalog: Parts: Technic, Brick  47432  Technic, Brick Modified 2 x 3 with Pin Holes, Rotation Joint Ball Half Vertical, and Rotation Joint Socket Catalog: Parts: Technic, Brick