Key light really good, unfortunately, with restriction.

The key lights were quickly on the spot + works great. Installation only works on "BKS" -Schlüsseln with not to big heads (max ~ 2,3cm head along measured in key course, cross-matter). Function + principle is ideally + you always catch the door one hand free. The most effective is because it only uses one key at a locking system with master keys. With several key lights attached to a keychain this would be too thick. ** Well unfortunately real downside: you have to be relatively cautious because the key light plastic is the catch. The internal 2 small hooks break sometime from inevitable. Then you have to make a new turn again. That would be similar in Alu not so. Too bad so + points deduction. ** PS: Also with us on site in various shops gave it to this key lights for years to buy temporarily. However, it is always the same version with plastic hooks problem. Too Bad. Otherwise, the idea is very good. Hope that obtainable from metal soon. Would find a ready market.