The lock can be operated outside by the key and inside by the key or rotating the knob.A jimmy proof lock usually equips with a security button to prevent opening the door outside without a key .

• 自碰功能锁体中一般都带有保险钮，当需要把门掩上而不锁闭时，则须把保险钮锁上，使锁面斜舌不伸出，门才能自由开关，门外不带钥匙，要想开门是不可能的。