Usage Tips:[Security]high quality carbon steel door stoppers security bar, industrial grade forging process,which the bracket is strong enough.Upgrade U-shaped Design - U-shaped design plus reinforce sturdy base, can be installed on any exterior door to prevent or delay entry during a .[Fit For 2 X 4 Lumber]special designed to fit lumber of 2x4,Industrial Grade Coating Finish, provide long-lasting rust-proof for indoor and outdoor use,Ideal for home, barn, shed, garage, gate,stable, etc.Quick and Easy Install - Within minutes your home will be more secure. Simple drilling is required and each drop open bar holder bracket has tooling holes for easy tool accessibility.Wide Application - This Door Security Bar Bracket provides great security for all types of or outswing doors, Ideal for garage, basement, barn, shed, warehouse, backyard and more.size: 14cmMaterial: Metalcolour: blackPackage Contents:2 x Door Barricade BracketsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.