The rod end screw helps to protect the camera gear from accidentally sliding off from your rods.
The rod connector allows you to connect the 15mm rods together.
[ INDUSTRIAL 15MM STANDARD RODS ACCESSORY COMBINATION ] Includes 2pcs M12 thread rod cap connectors and 4pcs M12 thread rod end protective cap stopper screws.
Constructed from high-quality aluminum alloy, solid and lightweight.
The combination works on both 2 pair 15mm rods, which has inner M12 thread on each end of the rod.