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The Panel + Groove Shelving System

semi exact

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What you need to know

Our Panel & Groove system is built to last. Made in the USA from the best quality recycled, 16 gauge, American steel. Then we sand-blast it in-house and hand finish using our durable eco-friendly powder coating. 

Designed to help you build your own furniture.

Have questions?
Click here to start a chat with our team.

With these you can build:

  • Credenzas
  • Book cases
  • Media & vinyl storage
  • Media consoles
  • Garage storage
  • + so much more. 

Three Panels make a box. Fasten to the wood of your choosing and build as many levels and compartments as you need. Each shelf pair is rated at ~40lbs (per shelf).

Pair with these legs for a full build kit:

Sliding Door Panel Coming soon!

Product details & specifications

Measure twice, cut once. We provide our specs right up front so you have the details you need to plan your build.

Click on drawing for larger image

Our powder-coat finishes are scratch-resistant and rust-proof, so they don't need much care. Just be sure to touch up any exposed steel if you happen to scrape them with something sharp.

Product Care

Clear & Color Powder Coats

Our powder-coat finishes are scratch-resistant and rust-proof, so they don't need much care. Just be sure to touch up any exposed steel if you happen to drag them across rough surfaces, such as pavers, or scrape them with something sharp.

Raw Steel Care

Raw steel arrives with a thin layer of residue to protect it from rust while in transit. Sealing your raw steel with wax, paint, or a clear coat will keep it looking its best (or you can let it develop a natural rusted patina).

  • Raw steel legs ship with wax for sealing
  • Apply a rust-inhibitive clear coat rather than wax if using outdoors
  • Sprayed finishes work best for paint or clear coat (use products that are suitable for metal)

Shipping & Returns

All items are able to be returned within 30 days from your order as long as they are in new condition. We also accept returns for workmanship defects within the lifetime of the product. Learn about our warranty here

USA Customers
Any item can be returned in new/unused condition and in original packaging. Returns are accepted within 14 days of delivery 

  • Returns requested within 14 days of the delivery date and in original packaging, that are unused, will be accepted.
  • Our original shipping and delivery fees are not refundable.
  • Returned goods have a 30% restocking fee.
  • There is a flat rate $35 return label cost for orders of $250 or less, for orders of $250 or more the return shipping will be at cost. If you’d like to use your own label feel free to do so and see below for shipping instructions.

International Customers
Unfortunately, we are not able to accept returns at this time for international orders.

Defective/Damaged Orders
Damage happens, and we will make it right! If your order arrives damaged or defective just let us know within 14 days of delivery. Email photos of the damage along with the packing slip to makewith@semiexact.com.

Click Here for our Terms of Service

Policy On Changing, Modifying or Canceling A Current Order

If you have an order with us and would like to make a change or cancel, we’d love to accommodate. We highly encourage you to reach out as soon as possible. Your order is custom and we want to make it perfect for you!

With a custom piece, once we start on it, it can only be made in your specific dimensions. To modify or cancel an order already in production creates waste in material and labor. We know talking about fees is no fun, yet it is a reality and changes mid production incur real costs. We have kept these fees low and kept them in line with reflecting the efforts of our team's professional work.

Here are the windows within which we accept changes/modifications and any fees associated.

Hairpin Legs/ Hairpin shelf & desk brackets, floating shelf brackets, bent flat bar brackets with and without lip:

  • 24 hours, free of charge.
  • Changes after 24 hours will have a change/ cancelation fee of 25%

Flat Bar, Tube Steel, Spider Legs, Platform Bed, Bedframes, Full frame metal bases, and other made-to-order items:

  • 48 hours, free of charge.
  • Changes after 48 hours will have a change/ cancelation fee of 25%
Ships in: 3-4 Weeks

Adaptable. Unique. Fun.

The Semi Exact Panel & Groove System provides endless adaptability for maximum creativity.

Share Your Build.


Build something with the Panel + Groove system, share it with us on IG @semiexact using the hashtag #panel+groove and share the love of making. 

Fun fact, the sketches to the left are from our original design process with Jesse Hill of Hill Studio.


What Others Are Building

The Semi Exact Difference

Your Ideas
You sketch it out. We help make it a reality with custom sizes and colors.
Our Inspiration
We focus on ready to make furniture that is easy and enjoyable to build.
Precise Manufacturing
We manufacture in the USA with precision equipment and a team that cares.
Shipped to You
We make every order to your custom specifications and ship to your door.