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Extrema Ratio BF4 Contractor Linerlock Folding Knife Up to $17.14 Off w/ Free Shipping — 2 models

Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in Stonewash Partially Serrated N690 SS Dagger Blade, Desert Tan Anodized Aluminum Handle, Double Edge Blade, Desert tan, 04.1000.0498/DW
Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in, Black Anodized Aluminum Handle, N690 SS Partially Serrated Double Edge Dagger w/Black Mil-C-13924 Burnishing, 04.1000.0498/BLK
Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in Stonewash Partially Serrated N690 SS Dagger Blade, Desert Tan Anodized Aluminum Handle, Double Edge Blade, Desert tan, 04.1000.0498/DW
1 of 2 images
Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in Stonewash Partially Serrated N690 SS Dagger Blade, Desert Tan Anodized Aluminum Handle, Double Edge Blade, Desert tan, 04.1000.0498/DW
Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in, Black Anodized Aluminum Handle, N690 SS Partially Serrated Double Edge Dagger w/Black Mil-C-13924 Burnishing, 04.1000.0498/BLK
2 of 2 images
Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in, Black Anodized Aluminum Handle, N690 SS Partially Serrated Double Edge Dagger w/Black Mil-C-13924 Burnishing, 04.1000.0498/BLK

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One Incredible, Discreet True Double Edge Folder! by Michael J Perrine, Verified Owner, February 9, 2026
I first of all took the all black option for concealment. The double edges are razor sharp as are the matching serrations. The length is an actual length of OVER 4'' blade to truly act as a concealed dagger when presented open. The handling is fast....
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Product Info for Extrema Ratio BF4 Contractor Linerlock Folding Knife

6" closed. 4.75" blade. Black anodized aluminum handle. Extended tang. Pocket clip. Bohler N690 stainless partially serrated double edge dagger blade with black Mil-C-13924 burnishing. Boxed.image

Specifications for Extrema Ratio BF4 Contractor Linerlock Folding Knife:

Manufacturer: Extrema Ratio
Quantity: 1

Package Contents:

  • Extrema Ratio BF4 Contractor Linerlock Folding Knife

Extrema Ratio BF4 Contractor Linerlock Folding Knife Orderable Models

List of Orderable Models

  • Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in, Black Anodized Aluminum Handle, N690 SS Partially Serrated Double Edge Dagger w/Black Mil-C-13924 Burnishing, 04.1000.0498/BLK , MPN: 04.1000.0498/BLK , UPC: 871373520828 , Code: 159-KN-BRD3492-04-1000-0498-BLK
  • Extrema Ratio BF4 Contractor Linerlock Folding Knife, 4.75in Stonewash Partially Serrated N690 SS Dagger Blade, Desert Tan Anodized Aluminum Handle, Double Edge Blade, Desert tan, 04.1000.0498/DW , MPN: 04.1000.0498/DW , UPC: 871373520835 , Code: 159-KN-BRD3492-04-1000-0498-DW
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