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Jake Hoback Knives OSF 3.5 Flipper Knife Limited Edition American Cross

Jake Hoback Knives OSF 3.5 Flipper Knife Limited Edition American Cross

$ 550.00

"Authorized Dealer Exclusive OSF" American Cross
The OSF3.5 has been one of those knives that has always had a huge following. OSF stands for "Open Source Folder."As Jake says, "When I started this project in 2010, it was after I had spent countless hours researching folding knives, mechanisms and lock geometry. I thought to myself, why not put this information into a solid model so that everyone who is getting into making folders can start with a finished idea to look at while they build their very own awesome knife. So I set out to make the knife in such a way that it could be made with simple tools, no CNC necessary. All you would need to do is waterjet cut a blank and start drilling and tapping."The knife design itself is a modified sheep’s foot blade with a properly engineered frame set. The single point rear standoff/backspacer is large enough to handle knife stresses but small enough to allow a rather large handle to blade ratio.

The blade steel is CPM-S35VN, with an excellent heat treat that seamlessly flows into and out of the titanium frame set. There are several options to choose from to make this knife your very own -- including pocket clips, pivots, backspacers, and inlays. This all adds up to a NPD (Never Put it Down), not just an EDC!


  • Overall Length: 8.75"
  • Blade Length: 3.5"
  • Blade Thickness: .1875
  • Blade Type: Plain Edge Sheepsfoot
  • Blade Material: CPM-S35VN
  • Blade Finish: Black Fallout
  • Closed Length: 5.125"
  • Handle Material: Titanium Black Fallout w/ Laser Etching
  • Handle Finish: Black Fallout
  • Safety System: Frame Lock
  • Weight: 6.4 Oz
  • Carry System: Tip Up Right/Left-Handed
  • 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
  • Hardened Stainless Steel Bearing Races
  • Made in the USA

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