Each outlet of the Cioks DC7 power supply can deliver 500mA @ 12V. I needed double the current, that is 1.000A @ 12V, to power a Surfybear Compact reverb. Using this parallel adapter I got the necessary power by connecting two outlets together.
I was a bit confused at first, because the color was a bit different than the product photo (light grey instead of white), Cioks using different colors for different cables. But I trusted Thomann that they would have sent the correct one, and indeed they had.
Construction is solid, it snugly fits the outlets and the DC power cable, no slack, very happy.