These two joints connect 2 round tubes each so that they can be bent at the connection point. Due to the fine toothing, you can bend the round tubes from the straight state in 7.5 ° steps and fix them with the hand screw. Up to max. 180? °. In this state, the round tubes are next to each other. The legs on both sides are angled 45 °. For your understanding: The article Tt223 has no twisted legs.
An internal spring keeps the teeth apart when the hand screw is loosened so that they can move freely and the teeth are not in the way.
If we assume a pipe with a wall thickness of 2 mm, then round pipes with a Ø (outer diameter) of 20 mm = Ø (inner diameter) of 18 mm fit into the inner hole of the connection.
Or the plug of the connection fits into round tubes with a Ø (outer diameter) of 29 mm = Ø (inner diameter) of 27 mm.
With a Ø (diameter) 29 mm round tube, insert the end of the accessories into the hole of the round tube.
With a Ø (diameter) 20 mm round tube, you put the round tube in the hole of the accessories.
This set article contains a left and a right connection. If you want to build a bimini, for example, you have the hand screws on the outside of the scaffold.
You can also buy the joints individually:
Articulation: 1 x left item number: TL257
Articulation: 1 x right item number: Tr257
These accessories are often used in the bimini, device holder, support stand, bathing ladder, sun roofs or reel construction for your boat.
When assembled, the joint is 68 mm long. It extends the pipe to 68 mm in length.