Thieves don't care if you have a lock on your bike because they're find a way to pick it. Keep you bike safe and sound from conniving thieves while out in the city with Stemlock from the French company IXOW! This is the most secure, and best bike lock that you will find on the market. The device internally disconnects your bike's handlebar stem from its fork, which makes it impossible for your bike to get stolen. So while you're riding out and about, the stem and fork will stay connected, but once you park your bike, all you do is insert its key in the top and push it down then twist it a bit. This removes the stem from the fork, resulting in its handlebars swinging left and right, making it useless to steal. But Stemlock not only keeps your bike safe, but also makes it easier to park when you have a crammed parking spaces like hallways. The handlebars can be turned sideways, while the front wheel stays in the same position. It'll debut this summer at the Eurobike show and will sell for $103.