Think twice before using a Kryptonite U-lock to lock up your fancy new bicycle--everyone and their cousin knows how to unlock them with a ball-point pen.
This method, which has been known to criminals for untold years, has recently been unveiled to the general public by national media. The process includes shoving a pen casing into the circular locking mechanism and jiggling and twisting until it opens.
Every lock with a tubular cylinder locking mechanism is vulnerable.
On the bright side, if you bought your lock within the last two years and still have the receipt, Kryptonite will replace it with a more secure model for free. See www.kryptonite lock.com for details.