Didn't mean too. Its a small springloaded clutch about the circumference of an old American half-dollar coin. Its got a detent in it that allows the motor to "p

Didn't mean too. Its a small springloaded clutch about the circumference of an old American half-dollar coin. Its got a detent in it that allows the motor to "pick up" the bolt wherever it may be in the lock cycle as it goes by but isn't so stiff that it can't be defeated with the key. If you're into RC is looks a lot like a "servo-saver".