Theory | Fat Carbon

Blade Finish: Damasteel
Color: White Storm
Sale price$490.00

Our take on a classic titanium folder, the Theory goes back to the roots of what makes a great knife great with no nonsense. Every detail is considered in this knife to be to everything you want and nothing you don't.

A wide Bohler M390 blade rides on silky smooth ceramic bearings for superb action and satisfying lock up sound resonating through the grade 5 titanium handles. A double-sided titanium thumb ramp allow for multiple opening options. The design is rounded off with a machined titanium pocket clip with a great reveal in the pocket.

Featuring Fat Carbon specialty carbon fiber, this version elevates the Theory into a whole new class. Paired with stunning Damasteel blades, these knives will be the crown jewel of any collection.

NOTE: Damasteel pattern may vary between knives and from photos shown. Please contact us with any questions.

Best Use

Hard Use


Brian Keyes


Reate Knives

Overall Length: 8.125"

Blade Length: 3.5"

Cutting Edge: 3.5"

Blade Thickness: 0.14"

Handle Length: 4.6"

Handle Thickness: 0.45"

Weight: 4.27 oz.

A Modern Classic

The Theory is our take on an ultra classic titanium folder. This new flagship is designed to be great in the hand and is built to withstand the years. With solid slab Grade 5 Titanium handles and stainless hardware, the knife’s weight brings an unmatched confidence in hand. A steel lockbar insert ensures reliable function and as always, Arcform’s generous warranty has you covered.

Refinement in Detail

Every part of the Theory was considered to bring you a knife designed with intent. From the contoured backspacer to our fading jimping, the Theory is a feast for the hands and eyes. No time was spared in refining our materials and finishes too. The accents are made to pop with contrasting values and hues. A Bohler M390 blade shines with our smooth satin or black DLC finish.

All-Around Utility

Flawless both in the pocket and on the job, the Theory doesn’t compromise on form or function. A wide blade balances out spine thickness and stays slicey. Ample jimping above the pivot and a deep choil below locks the knife in the hand. The Theory is rounded off with a machined titanium pocket clip giving a fantastic reveal in the pocket and no hot spots.

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