Suit for 2x4 lumber (Lumber is not included ). Can work with any width of the door and all types of inswing or outswing doors. Put in the 2x4 lumber and do the final confirmation. 【Widely Applicable】Suitable for all kinds of scenes, not only can enhance the safety of front door, garage door, gate, warehouse, garden, etc., but also can be used to fixed the shelf or as hook to be used.
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