LEGO® Plate, Modified 2x2 with Tow Ball Socket 42478
Technic Connector - LEGO® Technic Axle Connector 2x3 with Ball Joint Socket - The shop Briques Passion
LEGO power switch socket | Olive_Leaf | Flickr
LEGO PART 90611 Large Figure Skeletal, Limb, 4L with Ball Joint on Axle and Ball Socket | Rebrickable - Build with LEGO
LEGO part 89652 - Black Technic, Axle Connector 2 x 3 with Ball Socket, Closed Sides, Squared Ends, Open Lower Axle Holes at BrickScout
LEGO Plate 1x2 with Tow Ball Socket LIGHT GRAY (100 pcs) | BRICKshop - LEGO en DUPLO specialist
LEGO® 6360825 67696 - ToyPro
LEGO® 48169 4257583 - 6028425 - ToyPro
LEGO Part x1192px3 Technic, Axle Connector 2 x 3 with Ball Socket and Axle Socket with Black Rubber Insert [Dark Bluish Gray] (4223771) | iBricktoys: LEGO shop guide and database
Ballshaft! | New Elementary: LEGO® parts, sets and techniques
Plate, Modified 1 x 2 with Small Tow Ball Socket on Side : Part 14704 | BrickLink
Lego Light Bluish Gray Plate 1 x 2 with Small Tow Ball Socket Parts Lot of 50 | eBay
Rotating Lego-style Sockets | DeMilked
LEGO IDEAS - 3-Pin Plug Socket
LEGO Dark Stone Gray Connector 2 x 3 with Ball Socket and Smooth Sides and Sharp Edges and Open Axle Holes (89652) | Brick Owl - LEGO Marketplace
Technic Connector - LEGO® Technic Axle Connector 2x3 with Ball Joint Socket - The shop Briques Passion