Metal Frame Anchors comprise steel sleeve, machine screw and conical expansion nut used to fix door or window frame in variety of base materials,Also ideally suited to use with wooden window or door frames.Pass it through a guide hole in the frame and insert into a pre-drilled hole in the substrate, to fasten the machine screw with screwdriver and make conical expansion nut expand the steel sleeve to generate expansion force for installing.The machine screw could be removed and reinstalled.
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