2 Pack Heavy Duty Steel Door Brackets For 2x4 Door, U-shape Security Bar-201 Well-designed Open Bar Bracket: Provides excellent security for house doors, windows, barn, shed, etc. Barricade Brackets: Suitable for 2x4 lumber. An easy and economical measure to stop intruders and burglars. Heavy duty security brackets: made of durable 0.3 cm thick high tensile steel, super strong and sturdy, long service life , rust-proof black powder coating can provide anti-rust protection. Wide Application: Perfect for securing garage door, front door, basement door, barn door, castle entrance, gate chicken coop, garden gate, shed, warehouse, fence gate, bar, etc. Easy installation: Security door lock bracket includes 2 door brackets and 6 screws.