I wanted a light to attach to the key holder and purchased it. It is useful for a little confirmation in the dark. Brightness is also sufficient for the purpose. The only disappointment is that the turning on / off of the light is done by screwing in the main body, and if it is too loose it falls off. It is good if it is a little tight, but it is loose from the beginning, it seems to be lost in a hanging.
Compact and easy to use. Although I had a similar product before, it was a product that loosened the head and turned ON as with Kore, but the screw was a little loose, so I lost the eastern part. It seems that there is no worry of losing because it is solidly made.