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@Erudin
Put a Lockn'Roll QR on my BMiX, to add to the Kyrptonite cable to protect seat/seatpost. Not as good as glued in ball bearings etc. but only a cheap saddle/post on it anyway and i like to change saddle height easily.
Patent concept : in the horizontal position, the quick release lever is automatically locked, to unlock the bike has to be lifted-up past the vertical position. A special washer makes the unscrewing impossible even with a tool. A mobile axle inside the device prevents it from opening. To unlock the device, simply turn the bicycle upside down. As soon as the bike passes the vertical position, the axle falls down releasing the possibility of opening the lever.