Innovative design- setting the four number combinations for the shackle automatically sets a different combination for the lock box. Rubber clad shackle and housing prevents damage to door and hardware. I like the ShurLok for being able to store keys in a secure manner and making keys available to others. The size and substantial quality should thwart any attempt to break it. For anyone that has a need for a heavy duty padlock or for real estate business to secure a key to a house, the ShurLok is a fine value.
Instructions are clear and the operation is simple.
I found the ShurLok to be very useful for both a combo lock and for a lock box. The lock operation is easy to use and see. The zero locking feature gives an easy starting point even in the dark. I also keep another one locked under my truck with a spare key in it. I like the easy movement of the dials, the ease of being able to change the combination without a special tool and the non-rust body construction.