The Yale P125 hinge bolts can not be seen from inside or outside so giving maximum security to your home and are ideal for outward opening doors. Automatically engage and disengage when opening and closing the door. Hinge bolts will resist hacksawing and attempts to remove the door from its frame and can be fitted in minutes, simply place x 2 per door just below hinges to secure the door from being removed. This Yale P125SC hinge bolt is finished in Zinc