D4-SS Hardened 440A Stainless Blade

$69.95 $72.90

available as an UPGRADE KIT

This can be used to UPGRADE or replace a D-Series Blade, notably converting a Red Polymer or Black Al Blade on any Hybrid to the Toughest Blade Available.

Compatible with:

UPK-D1, D2, and D4

Handle Material Comparison (Tensile Strength)

  • 440A Stainless Steel 220+ ksi 
  • Black 7075-T6 Aluminum 70 ksi
  • Red 50% Glass-filled Nylon 9 ksi



  • Requires Torx T20 Driver to remove screws (Not Included)
  • There are 2 stainless springs located under/inside the Button, maintain pressure on button when loosening the Lock screw,  recommend  opening slowly.
  • Upgrade requires the use of Loctite 243 in all 3 instances of hardware screws and is included

What's Included

Blade(Only) Kit (uses existing Red Button and Hardware)

  • Hardened 440A Stainless Steel Blade
  • Loctite 243 0.5ml

SS Button Kit (Max Duty)

  • Hardened 450 Stainless Steel Button and is the strongest Button
  • Hardened 440A Stainless Steel Blade
  • Custom Hardened Stainless Steel lock screw
  • Custom Hardened Stainless Steel Shoulder bolts x2
  • Loctite 243 0.5ml