Conclusion: The Streamlight Key-Mate has got to be the absolute cutest light I have ever seen. It looks just light its bigger brothers, but it's so tiny! Fit and finish are very good for a keychain light. The anodize is even and smooth, the threads are clean, the O-ring makes a positive seal, and the keychain and pocket clip are surprisingly durable. The lens is unbreakable Polycarbonate.