In the practice of the house master often there are cases associated with loosening or tightening of screws of large diameter. Without the “powerful” screwdriver not to do. Equip her with a pen, as shown and work with it will be much easier.
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On the door there are no visible locks or holes for keys, but it won't open, as if locked from the inside. Knowing its secret, we can say that, because on the other side of the door...
