Rod system
From Brickwiki
A connection system. See Clip and Rod for a typical usage of this system. Rod System Rods can be 3 LDU cylindrical protrusions or connections on parts, as well as tubing in their own right.
Some example parts include:
- Plate 2 x 2 with Rod Frame Octagonal
- Antenna 4H
- Plate 1 x 2 with Handle
and lots of others.