What are the inside dimensions of the "U" opening?

A 2x4 piece of lumber fits just right.

What is the space from top hole to bottom hole. I want to mount the brackets on a horizontal fence 2x4. Will the brackets fit ok on a horizontal 2x4?

The top hole to bottom hole is 5”. You’d have to mount on a 2 x 4 vertically. 2 x 6 or wider would work horizontally.

Please verify the bolt and/or screw hole diameter .... thanks, e-jay

Hello, The diameter of the bolt body is 5mm, hope this help you.

What the internal width of the bracket? i need something that is 53mm?

The width of the metal bar used in the brackets is 1.5625 inches and the opening space (designed for a finished 2 x 4 piece of lumber) is 1.6875 inches at the bottom of opening and 1.75 inches at top of opening. I wasn’t sure which measurement you were asking about so gave you both measurements.

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Door Barricade Brackets,AINAFIX 2 Pack Drop Open Bar Holder for Home Security, 2x4 Bar Brackets Prevent Unauthorized Entry, Carbon Steel,Black

Door Barricade Brackets,AINAFIX 2 Pack Drop Open Bar Holder for Home Security, 2x4 Bar Brackets Prevent Unauthorized Entry, Carbon Steel,Black

Product ID: 406484044

Details

Brand
AINAFIX
Color
Black
Finish Type
Powder Coated
Item Weight
0.74 kg
Material
Carbon Steel

⚡Quick & easy install

📏Fits standard 2x4 lumber

🛠️4mm high-strength steel

฿3129

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Description

🔒 Lock down your peace of mind with steel-strong simplicity!

UNBREAKABLE DEFENSE - Crafted from 4mm carbon steel to absorb high kick and push forces without bending.
VERSATILE PROTECTION - Ideal for inswing or outswing doors—garage, basement, shed, or safe room ready.
RUSTPROOF RELIABILITY - Powder-coated finish guarantees long-lasting durability against weather and wear.
PERFECT FIT NO GUESSWORK - Specifically designed for standard 2x4 lumber, ensuring seamless door reinforcement.
EFFORTLESS SECURITY UPGRADE - Install in minutes with included screws and expansion tubes—no pro needed.

AINAFIX Door Barricade Brackets come in a 2-pack, engineered from 4mm powder-coated carbon steel to reinforce doors using standard 2x4 lumber. Designed for quick installation on any exterior door type, these U-shaped brackets provide robust resistance against forced entry, making them an essential upgrade for home security and safe rooms.

Specifications

ASIN	B09GG6KK8Y
Best Sellers Rank	#67,446 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #509 in Shelf Brackets #553 in Hardware Brackets
Brand Name	AINAFIX
Color	Black
Customer Reviews	4.8 4.8 out of 5 stars (686)
Finish Types	Powder Coated
Item Depth	1.5 inches
Item Weight	0.74 kg
Manufacturer	AINAFIX
Manufacturer Part Number	HOMESAFE01
Material Type	Carbon Steel
Model Number	HOMESAFE01
Mounting Type	Door Mount
Set Name	Door Barricade Brackets 2 Pack
Unit Count	2 Count

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฿3129

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Sneha T.

Received my product in pristine condition. Great service overall.

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