Talk about an obvious item to have.. I haven't seen these before.
I grabbed a couple and I tell you they make a huge difference on board space! I soldered the pins on mine (I think you can have him do this for you?) I got mine with 220 Ohm resistors so they work well with 5/3.3V. Those are optional and you can get different sizes. If you're curious about what size you should get ask AtomSoftTech.. very helpful, very prompt.... the speed of delivery was super quick even across the US.
It's amazing how much you don't realize 4 LEDs and their current limiting resistors take up on a board. I tried to upload an imagine but it's not working out with Tindie for some reason despite just recently uploading one for another project. Perhaps cost of product per MB of imagine isn't working out? :D Trust me these will save you a ton of space and they're much easier than digging for the right resistors.