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Friction Fit


What do we mean by Friction Fit?

In simple terms, every wood iPhone case made has a mechanical connection to the phone. It snaps in, wraps around, or slips on in more than one piece. Have you ever struggled to remove a case from your iPhone? Nearly dropped it or flung it across the room?  We asked the question why. There must be a better way.


Our cases are different

Machined from a single piece of wood, the case is precise to 1/1000 of an inch. In developing a case that would hold your iPhone safely, yet still was easy to slip on and off, we came up with a simple, yet effective patent-pending solution.



Lining the inside edges with thin cork solved several problems:

1) Grip - The cork grips the iPhone with its high coefficient of friction. The cork compresses slightly when your iPhone is inserted

2) Thermal Expansion - Wood moves, the cork absorbs this movement by compressing

3) Padding - The cork adds an extra level of protection to your phone



We not only chose cork because it is a natural material, produced sustainably from trees, but also for its science.

Simply put, because of a complex materials science equation involving Poisson's Ratio, cork is amazing. 


When compressed, it rebounds, for a long time. Rubber and other squishy materials eventually loose their ability to rebound. Think about why corks have been holding back wine for hundreds of years...


Cork has been used in fine musical instruments, as flooring, padding, gaskets, and many other uses. It is durable and perfect for its application in Kerf Cases.


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You guys did a fantastic job on this case! I will pass along to my high-end phone case friends. Keep up the good work, thanks for the prompt delivery. You guys rock!

The new case arrived today and you are definitely right - it is fantastic! It is just so different! Love it! Will be letting others know where to go when they want a quality, very different cell phone case.

I received my case yesterday. I love it. Generally, less is more for me with my Iphones. The phone is beautiful, I love the form factor and don't go with a heavier, bulkier case. However, yours is not that. Very unique case. I'm a big fan. Well done.
-Jim Rome

This case is a work of art.

I love this case. What separates Kerf cases from everything else on the market is the quality of the product. When you handle it, you feel like you're holding something special.

This case checks all my boxes: eco-friedly, handmade, clean design, durable and light-weight.

The quality of wood and craftsmanship are outstanding.

Absolutely gorgeous, unique case like nothing I've owned before.

This is the best case I have ever owned. Not only does it protect the phone but it is visually stunning and gets complimented constantly, truly a work of art.

The character of the wood is stunning. It's not like any other wood I've ever seen. Each case is a one-of-a-kind, but this one is uniquely impressive in its beauty. So happy with this case! Thanks to Ben for the outstanding customer service with the speedy shipping and detailed emails. I'm a customer for life. 

The character of the wood is stunning … So happy with this case!

This is an excellent phone case. It grips well on the hand therefore prevents accidental drops.

This spalted black walnut iPhone 6+ case was beyond my expectations. And the expectations were high … this product does not disappoint as the craftsmanship is five-star.

I didn't know what to expect, but when I got it in the mail and put it on it was absolutely beautiful. It is a great looking case. I highly recommend.

Absolutely beautiful! A true work of art. Phone fits perfectly. Looks better than any case I've owned.

I'm extremely pleased with it. It's like having a work of art surrounding my phone.

This case is crazy. No one else has this, it's on another level. Im always looking for something to stand out and this case is it.

I just received my new case and can not be more impressed and satisfied with this product. The flamed maple is awesome and the fit on the iPhone 7 is perfect!

I really love your products. They make me hate my phone a little less.

Thank you for making awesome things. I love it.

I received my case today. The fit is perfect and it is gorgeous!

I received my new phone case, and it is beautiful...a work of art!

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© 2017, Kerf Case     201 North Braddock Ave: #334     Pittsburgh, PA 15208     (412) 447-5602
Custom Alloy and Real Wood iPhone Cases & Wooden Google Pixel Phone Cases - Handmade in USA