I am constantly breaking chargers through perpetual use, stress and general wear and tear, and occasionally tripping and ripping them out of whatever poor unfortunate device I was using that needed power. These cord protectors are a great fix. I stumbled across the product by happenstance and had no idea that that they made cable protectors, and considering how many cables I have had to replace in the last few years, I wish I had known about them earlier. They are pretty simple by design. Wrap them around the base of where your cord meets up with whatever type of charger and it will protect it from bending, stripping, and tearing away. I imagine that it will work with any manufacturer's cables, but it certainly works with the Apple devices that I have. They really are a nifty idea and certainly well priced. I am quite satisfied with this purchase, and would recommend them to anyone who is hard on chargers.