Jake Hoback Custom OSF Flipper 3.625" CTS-40CP Acid Washed Blade, Bronze Bedform Titanium Handles - KnifeCenter Exclusive

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Part #: JHKCOSFBZBF | Hoback Knives
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JHKCOSFBZBF: Custom OSF Open Source Folder, Bronze Bedform

Jake Hoback Custom Knives

OSF stands for Open Source Folder and it was an idea of Jake's a number of years ago that had the potential to change the industry. Jake wanted to help out aspiring knifemakers by releasing the entire CAD file to allow someone with a CNC machine to make this exact knife. Every minute detail Jake spent months perfecting was included, so all you had to do was run the program and your CNC mill would take care of the rest. The only stipulation was that you could not profit from the manufacturing of his design. As you'd expect, someone abused this privilege and Jake was forced to take down the CAD files and put the OSF on the back burner...until now. There are only a handful of custom OSFs floating around out there and it happens to be without a shadow of a doubt our favorite Hoback, so if this knife and its story speak to you, don't hesitate, as it won't be around for long.

The OSF has many design features and characteristics that make it one of the best custom knives to be put back onto the market in recent years. The sheepsfoot blade gives you belly for slicing and a reinforced tip for stabbing, which is why it's one if not our favorite blade shapes. The handle tapers down toward the butt end, making it extremely comfortable no matter your grip method. It's a big, beefy knife, like most things Hoback, but it's extremely well designed for everyday carry and tactical applications. It measures 8.75" overall with a 3.625" blade made from CTS-40CP stainless steel with an acid washed finish. Carpenter CTS-40CP alloy is a powder metallurgy, high-carbon chromium stainless steel designed to provide stainless properties with maximum hardness. The titanium handle has a dark bronze anodizing on top of the KnifeCenter exclusive Bedform finish. This complex milling pattern looks great and provides a great deal of traction for your fingers. The two pillar construction makes this knife completely flow-through so you can easily see the intricate machining that went into creating the internal lightening pockets. It includes the HRD Hoback Roller Detent, replaceable lockbar insert/overtravel arrestor, full custom hardware, and a story unlike any other knife in the industry.

Bedform Finish

A bedform is a feature that develops at the interface of fluid and a movable bed, the result of bed material being moved by fluid flow. Examples include ripples and dunes on the bed of a river. Bedforms are often preserved in the rock record as a result of being present in a depositional setting.

The Bedform finish is a culmination of several years of Jake's hard work in getting an elegant hard working finish onto his knives. He has found the Bedform finish to add a great deal of grip while not causing hotspots on the hand while working with the knife. Hoback knives are made with Hard Work in mind and Jake structures all facets of his knives with that in mind. From the engineered internal lightening pockets to the HRD (Hoback Rolling Detent) system, Hoback Custom Knives have and will continue to be on the forefront of design and innovation and this Bedform finish is only available from the KnifeCenter.


  • Pivot thrust bearings
  • HRD (Hoback Roller Detent)
  • Hardened stainless steel lock insert with over travel prevention
  • Engineered internal lightening pockets
  • Standard sizes on all screws for ease of replacement
  • 3D machined Mark3 custom pivot
  • Cold formed bearing races (work hardened to increase bearing and knife life)
  • KnifeCenter Exclusive Bedform 3D machined titanium handle


  • Blade Length: 3.625"
  • Cutting Edge: 3.50"
  • Handle Length: 5.125"
  • Overall Length: 8.75"
  • Blade Material: CTS-40CP Stainless Steel
  • Blade Thickness: 0.186"
  • Blade Style: Sheepsfoot
  • Blade Grind: Flat
  • Blade Finish: Acid Wash
  • Handle Material: Bronze Anodized Titanium
  • Handle Thickness: 0.56"
  • Locking Mechanism: Frame
  • Pivot Assembly: Thrust Bearings
  • Pocket Clip: Bronze Titanium (Tip-Up, Right Carry)
  • Sheath Material: Hoback Custom Leather Pouch
  • Weight: 5.9 oz.
  • Designer: Jake Hoback
  • Handmade in the USA

Related Categories

Hoback Knives, Hoback Knives Osf Series, CTS-40CP Blade Steel, Titanium Handle Material, Folding Knives, Folding Knives Frame Locks, Made in USA

Custom Made Knife
Titanium Handles
Pocket Clip
Frame Lock
Made in USA
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