Duck Rainbow Iridescent Dragon Spring Assisted Stiletto Knife 3.75"



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The spring assisted  knife is quite a remarkable blade. Developed because of laws and municipalities that bar or prevent one from legally owning and/or carrying automatic switchblade knives, it is the perfect solution!

This spring assisted knife by Duck, in contrast to a standard automatic switchblade knife, is not opened by pressing an activating button or lever (the button / lever is what gets an automatic knife classified as illegal) , it is opened by using the index-open "flipper", which creates a full hand guard when it is open.

The beauty of this spring assisted feat of engineering lies inside its pivot / handle area where a wound up internal spring has been nested that assists in the opening of the knife. It is this spring that differentiates this spring assisted knife from its automatic switchblade / OTF cousins as well as the standard folding, manually-opened, lock blade knife.

To summarize the internal spring featured in this knife assists and finishes the opening process once the index flipper is pushed. That's right !!! Once the blade has reached a 30-40 degree angle, it automatically slams open the rest of the way !!

Springing open to an impressive 8",  This knife is not for the timid.

The handle of this spring assisted knife has been Heat Treated to an Iridescent / Rainbow finish and features a durable 440 Stainless Steel Frame with Aluminum Dragon etched Scales with Jimping that provides a secure lightweight grip along with an aggressive look. The Blade is a 3.75" Spear Point bayonet-style blade and is also made of Heat Treated Iridescent 440 Stainless Steel Steel which provides the longevity and durability found in some of the most expensive cutlery! Add to all this, a handy / removable pocket clip and you have a knife perfect that is conveniently suited to most tasks!

As a legal alternative to a push button automatic knife, an impressive unique knife for your collection, or an incredibly useful tool, perfect for daily use, the Tiger spring assisted knife fits the bill!


  • Overall Length: 8"
  • Blade Length: 3.75"
  • Cutting Edge: 3.5"
  • Blade Thickness: .12" (approx 1/8 inch)
  • Blade Width: .75"
  • Blade Material: 440 Heat Treated Stainless Steel
  • Handle / Folded Length: 4.25"
  • Handle Thickness: .48" ( approx 1/2 inch )
  • Handle Material: 440 Heat Treated Stainless Steel
  • Color: Iridescent Rainbow with Dragon Etching
  • Blade Style: Bayonet / Spear Point
  • Blade Edge: Plain
  • Options: Spring Assisted / Index-open "Flipper" / Pocket Clip (Tip-Up) / Jimping