Here we have the HXCCII Cross Clamp, the ones offered here are ex-display out of box stock. This is designed to connect Hexrack II Tubes together. The clamp comes supplied with two inner sleeves and two memory locks. The cross clamp is also backwards compatible with the original Hexrack.
The cross clamp is used to connect two hexagonal tubes at 90-degree angles for example, to connect a leg tube with a tube that has been horizontally set.