Image Item No. Description  32174  Technic, Axle Connector 2 x 3 with Ball Joint Socket - Open Sides, Angled Forks with Closed Axle Holes Catalog: Parts: Technic, Connector  45574  Technic, Spike Connector Flexible with Four Holes Perpendicular Catalog: Parts: Technic, Connector  47324  Technic, Spike Connector Flexible with Four Holes, Flat Center Catalog: Parts: Technic, Connector  45573  Technic, Spike Connector Flexible with Four Holes, Raised Center Catalog: Parts: Technic, Connector  62520c01 (Inv)  Technic, Universal Joint 3L Catalog: Parts: Technic, Connector