“It's an extender for the breakout garden, what else can I say. Wish there was a 2xI2C + 1xSPI version though. I used it to mount the VEML6075 uv sensor horizontally.”
“Great for letting you have breakouts on flexible leads or, as I did, connect the breakout to a breadboard easily. They snap in place just as well as breakouts do in the original gardens.”
“These are a bit expensive in my opinion but they are quite useful especially if you want to use some of the Pimoroni breakout boards with more than just a Raspberry Pi. With these you can connect them to a breadboard or to header wires without having to solder connectors onto the breakout boards (which would make it impossible to plug them into the Breakout Garden PCB). It's a bit annoying that SPI and I2C have different footprints so these are not interchangeable but that's just a minor inconvenience.”