Columbia River CRKT 8900K Mah Eraser Flipper Folding Knife (3.90 Inch Black Combo Blade) G10 Handle

MANUFACTURER: Columbia River Knife & Tool
CRK8900K  MPN: 8900K

This product is no longer available, but don't go just yet.

CRKT 8900K Mah Eraser Folder, Black ComboEdge Blade, G10 Handles. Designer Liong Mah uses a bold profile to shape his vision of tactical. The Eraser™ locking liner tactical folding knife is designed and built to perform in your world. Its modified tanto blade wields a strong point for tough piercing into a variety of materials, and the elongated cutting edge can go the distance.

Opening the blade is rapid with use of the Flipper on the spine. Another added feature is the patented LAWKS™ manual safety mechanism so you can secure the blade when open. The robust Eraser™ handle has a slight bend at the fore end to create a more substantial grip form for thrusting. The handle shape also affords a nice blade guard as well as a generous pommel. The machined G10 scales are radius contoured to fill the grip and the full, stainless steel liners create a formidable foundation for tough use.

All in all, the Eraser™ folder is one excellent tactical folder that can take every bit of what you can dish out.

Columbia River Knife & Tool - 8900K Specifications:


  • Open Overall Length:
    8.75 inches
  • Closed Length:
    5 inches
  • Weight:
    6.2 ounces


  • Length:
    3.875 inches
  • Thickness:
    0.14 inches
  • Material:
  • Blade-HRC:
  • Finish:
    Black Ti Nitride
  • Grind:
    High Hollow
  • Style:
    Modified Tanto
  • Edge:


  • Material:
  • Liner:


  • Type:
    Locking Liner
  • Safety System:


  • Carry System:
    4 Position Clip


  • Modern blade design offers optimum cutting geometry and overall knife balance.
  • Blade flipper makes opening simple and rapid. Also is a very effective finger guard in the open position.
  • Overbuilt knife butt enhances overall build integrity.
  • The best of everything comes in the form of a flipper opener and the LAWKS manual safety mechanism.
  • An oversized pommel end design is built tough for hard use, and a movable stainless steel carry clip provides easy access carry.
  • Made in Taiwan

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Your Rating: 5
Mike Waterfield on 02/18/2018 10:12am
I have had my mah eraser for several weeks and it is still very stiff to open and I've opened and worked the blade literally thousands of times. It is still stiff to open but better than it was. I wish it had bearings like my fossil, problem solved. The serrated section is shorter than all pictures I've seen at 1 1/8 inches not very useful. The serrated section should be at least 1 1/2 inches to aid in harder cutting. The tanto style is wonderful for strength and if the entire cutting edge was flat like a wharncliffe style blade it would be much more useful for edc cutting and eating because then only the point would touch surfaces and not dull so much of the blade. I believe with these changes it would be the most useful knife I've ever had. I hope this has helped and if you make a knife as I've described please let me know because I want one for myself and a couple for gifts. Everybody would love a very useful edc knife. Thanks - mike waterfield
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