Bracket
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Countertop Support Brackets
Mantel Brackets
Metal Shelf Brackets
Floating Brackets
Resources
- Corbel Installation
- Shelf Bracket Installation Guide
- Standard Front Mount Countertop L Bracket Installtion
- Hidden Island Countertop Bracket Installation
- Hidden Granite Countertop L Bracket Installation
- Hidden Granite Countertop Flat Bracket
- Floating Countertop Wall Bracket Installation
- Hidden Center Mount Countertop Bracket - Knee Wall
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Hidden Island Countertop Bracket
FROM$39.00 - $73.00
Save 5% automatically when you order 10 or more.
Hand-Crafted In America
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Our Hidden Island Countertop Bracket is designed to provide evenly distributed support throughout the entire granite countertop. Island Countertop Brackets are the most popular choice for supporting countertops that span large cabinet bases. These brackets maximize the space under your countertop overhang by keeping this space open and non-obstructed.
Specifications -
- Dimensions:
- 2.5” Wide x ½” Thick
- Sizes ranging in 16” long to 44” long
- 2 Mounting Holes, sized for 8 x ¾” Pan Head Screws (Included)
- Material: Solid ½” Thick x 2.5 Wide American Steel
- Finish Options: Premium black & white powder coated finishes which are suitable for indoor and outdoor use. Raw steel is also available for your own color matching or for no paint needed applications.
Additional Information -
- Made in the USA
- Carrying Capacity: 325 Lbs. per bracket
- The horizontal end has a smooth beveled end for safety
- The narrow profile makes this support nearly invisible for a clean look
- No knee knocking feature
- Installation requires to simply route out the back of your cabinet (2.5” wide x .5” deep)
Uses -
- Support Kitchen Island Countertops
- Support anything you want on a cabinet including Granite, Quartz, Natural Stone, Concrete, Wood, Formica, and all other materials
Size & Quantity Guide
What Size Bracket Should I Use?
- NOTE: Ideally you want no more than 3" of unsupported countertop extending past the end of your bracket.
- These brackets mount to the inside of your cabinet face and extend out past the cabinet base on the countertop overhang side.
- Let say you have a 15 inch overhang with a 32" cabinet base, (15" + 32" = 47"). Now subtract 3" (this is the ideal amount of countertop hanging past the bracket), 47" - 3" = 44".
- This is what the math for this looks like: (15" + 32") - 3" = 44"
- Results: You would want to order a 44" island bracket.
How Many Brackets Do I Order?
- These island countertop support brackets are typically spaced 18 - 24 inches apart
- To figure out how many brackets you need lets start with 2 brackets at each end of the countertop set 4" - 6" inches in from the edge.
- Now measure the distance between the 2 end brackets and use the following formula:
- (Distance Between) divided by/ (desired bracket spacing).
- Example 76 / 18 = 4.2, so you need 4 more brackets to support the space left between the two end brackets.
- Here is an example using a real countertop installation:
- An 84" wide countertop with 2 brackets set 4 inches from the end would leave you with 76" left to support; (84" - 8" = 76"). Now take 76" divided by / 18" = 4.2, So you would need 4 more brackets for the space left giving you a total of 5 brackets for this project.
- For a countertop overhang spanning 84" wide with 2 brackets set in 4" from either side and a 18" span between brackets, you would order 6 brackets total. 2 end brackets and 4 to support the remaining 76" span.
Installation Guide
Installation Instructions
View Bracket Spec Sheet (PDF)
View Bracket Installation Guide (PDF)
Why Iron Supports?
Made in USA
Quality Supports
Heavy Duty
Lifetime Guarantee
Fast Shipping
Overall rating: 4.949367 / 5 from 711 reviews.
AI Generated Review Summary
The Hidden Island Countertop Bracket offers high-quality support for granite countertops, praised for its sleek appearance, easy installation, and excellent finish. Customers appreciate its reasonable price, fast shipping, and the great service provided.
Summary topics
- Price: 4%
- Support Quality: 17%
- Repeat Purchase: 5%
- Shipping Speed: 17%
- Product Quality: 15%
Review topics: ["instructions","size","installation","supports","color","weight","fit","fabricator","material","results","quality","problem","shipping","feel","design","work","finish","look","value","service","packaging","screws","craftsmanship","price","edges","construction","strength","order","staff","deal"].
Review highlights
- "Support brackets arrives quickly/ were of good quality and served their purpose." —
- "Great experience Great product and service easy installation finish was excellent." —
- "Best support design I've found for a heavy island with an overhang." —
Reviews
Answer to Prayer
"Our contractor thought 3/4 inch plywood with 1/4” thick & 2” wide strips of steel to go underneath LED panels (that can not be glued) was going to be adequate to support 111”x 67” island with an “L” shape overhanging sitting area for our Quartzite Crystallo Slab. We weren’t taking chances with the stone & were very uncomfortable with the flex of the sub-deck. Enter Iron Support to the rescue!! Iron Support answer our prayers of worry!! We retro installed support (3 long straight supports & 2 - “L” support under the sub-deck notched into the cabinets. The support is much improved!! 🥳 P. S. Ordered Wednesday & got to us Friday, expedited! Thank You! ❤️"
Homeowner
"Great quality and finish"
Exactly what was required for
"Exactly what was required for our 14" quartzite island overhang."
worked great good product
"The web site is very helpful"
Great product, exceptional customer experience.
"Brackets are top notch, perfectly packaged in a very efficient way, and the delivery time was quite reasonable."
Best solution for granite slab overhang!
"Brackets arrived two days ahead of schedule, great design, hidden support, easy installation with a few basic skills and tools. Installer was impressed and asked where I purchased them. I shared the website information and am sure that he’ll be contacting Iron supports for future jobs. I still need to figure out my fireplace mantle design and will ordering supports for that as well."
Excellent Island Support
"Perfect for our island overhang. Fast and helpful service. Our second time to use these island supports."
Strong supports - but buy fewer than they suggest!
"The supports are very high quality, and I love that they come in white to blend underneath with my light countertop on my island. However, I followed the Iron Supports calculations exactly to know how many to order, and it was 5 total. So that's what I got. Both my fabricator and contractor told me at separate times that I really only needed 3 total. Five was overkill, but I had them install all of them anyway since I didn't want the hassle of returning them. So I feel that Iron Supports overstates what is truly needed just to get you to buy more. Other than that, they're good quality."
Fast reliable shipping and worked great.
"Thanks for the fast same day shipping that arrived in time for my island countertop installation. The brackets work great!"
Q&A
- Is the length of bracket true to the specified size? i.e. is the a 20in bracket actually 20in in total length? I want to confirm so I can account for the thickness of the cabinet walls the bracket will be screwed into. Thanks
- Yes, the bracket length is true to the specified size. For example, a 20" bracket measures 20" in total length. This allows you to accurately account for the cabinet wall thickness when planning your installation.
- Hello - I have an L shape island, but want to install a square countertop. The long end is 62" and the short end is 25" so the countertop would extend another 37" past the cabinet there. How many brackets would you recommend and placement? Thank you, T
- These island countertop support brackets are typically spaced 18 - 24 inches apart.
- Will these brackets work with MDF cabinet boxes?
- Yes, it will work.
- Hello, I would like to have 12" overhang on 1 sides of my island and 10" on the other two sides. The cabinet size is 81" long x 24" deep base unit. One overhang of 12" on the 36" length and 2 10" overhangs on the 24" ends. How long do my brackets need to be? How far back from the end of my quartz countertop can I go? How many brackets will it need on each side? Will I need to add an extra, angled (45 degree), support on the 2 corners where the 2 overhangs meet?
- Hi, we recommend you get the four (4) Hidden Granite Countertop Flat Bracket (https://ironsupports.com/products/hidden-granite-countertop-flat-bracket) on the shorter side, two (2) brackets on each end and four (4) 36" Hidden Island Countertop Bracket (https://ironsupports.com/products/hidden-island-countertop-bracket) on the longer side. To determine the size of the flat bracket, here's the link you can use for your reference - https://ironsupports.com/products/hidden-granite-countertop-flat-bracket#determine-what-size-quantity-to-order. And to support the corner, you'll just need to install the brackets closer together.
- Is the 44" bracket the longest one available? My counter was going to be 54" wide.
- Yes, the size 44" is the longest hidden island bracket we have. Thank you.
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