A friend received this baby pack from our local Sure Start center (they're a UK children's initiative for those who don't know). It contained various, obviously useful items for people with a baby and these (pictured). We don't know what they are but we're assuming they're some kind of baby proofing device? Does anyone recognize what they are? There's no information or instructions in the pack.
Those look like something for wrapping up and securing draw cords on blinds. You would wrap the cord between the diamond shaped piece and the long piece. You can then insert the cord into the holes in the diamond piece to keep it from coming unraveled. This way you can shorten the strings so kids can't choke themselves on it.
This is just a guess. they would be great for installing at the back of a drawer to prevent it from being pulled all the way out and onto a little toddler. the two "holes" at the corner of the diamond section are the mounting points. Position it so that the forward-curving section is above the level of the drawer, so that it will catch the upper drawer frame when the drawer gets pulled out far enough that it might fall out.