The present invention relates to a lock, which comprises a tapered ned (1), mounted in a additive lock body (4) hich has an aperture (41) for fixing and a through hole (43) located thereon for the lockpin passing in and out. A peristome (42) is fixed on the additive lock body (4) for a key inserting in to open the lock normally. The engagement of the lock body (1) and the aperture (41) is a fake connection, thereby allow the rotor of lock (that is lock core (l3)) and the stator of lock to rotate together via joint by a ball in the lock core. The lock core (13) is revented from drilling and opening illegally, as the lock body (l) having the function of racing, when the lock ore (l3) is drilled by violent tools.