Benchmade Fixed Infidel Knife Black Aluminum (4.5" Black) 133BK

For Size Reference For Size Reference
MSRP: $250.00
Our Price: $212.50
In Stock!
Add to Wishlist
Item #BHQ-78785


  • Overall Length:9.21"
  • Blade Length:4.52"
  • Blade Width:0.97"
  • Blade Thickness:0.14"
  • Blade Material:D2
  • Hardness:60-62 RC
  • Blade Style:Dagger
  • Blade Grind:Flat
  • Finish:Black
  • Edge Type:Plain
  • Handle Length:4.69"
  • Handle Width:1.21"
  • Handle Thickness:0.48"
  • Handle Material:Aluminum
  • Color:Black
  • Weight:5.11 oz.
  • User:Right Hand, Left Hand
  • Sheath:Polymer
  • Knife Type:Fixed Blade
  • Brand:Benchmade
  • Model:Fixed Infidel
  • Model Number:133BK
  • Country of Origin:USA
  • Best Use:Tactical
  • Product Type:Knife


The Benchmade 133BK Fixed Infidel is a full-tang tactical fixed blade designed after the iconic Infidel out-the-front knife. Its double-edged blade is made from resilient D2 tool steel in a black coating. Grooved, black anodized aluminum scales provide absolute grip security. Includes a Tek-Lok compatible Boltaron sheath.

  • Fully ambidextrous design eliminates the guesswork of a blind draw.
  • D2 tool steel blade offers excellent toughness and edge retention.
  • Tek-Lok compatible Boltaron sheath allows a variety of carry options.

Customer Reviews

Write a review for this item
Edge grind question
Randy P.
I have one of these new fixed blade Infidel. It reads 'black class' on the box. I am not fond of the sheath, particularly the strap. On inspection, the edge is ground only on one side of the blade with a light polish on the other side. I thought this was a defect, but it turns out it is part of the design.
Why grind only on one side? Does it have something to do with D2 steel?
A nice dagger blade
Patrick L.
I like this knife. The aluminum handle feels good in the hand, like it will not slip out of your hand during use. I did find the grip to be a bit small for my hands though. A quick wrap in paracord fixed this though. The snap strap on the sheath does nothing to secure the blade. But the knife snaps into the sheath nicely so there is no risk of it falling out .