Bar Clamp Coupler

I always seem to need a longer clamp than I have, so I made a coupler to pair up multiple ones.
This was made in tinkercad.
I printed the blue one with 50 percent infill at high speed and the green one at 100 percent in low speed. Both in PLA.
The lighter one will do light clamping duty, but I wouldn't tighten it up too much.