Spyderco Manbug Lightweight Folding Knife 1.97" K390 Satin Plain Blade, Blue FRN Handles, Lockback - MFPK390

$87.00

MSRP* : $116.00 | You Save* : $29.00 (25%)
Part #: SPMFPK390 | Spyderco Knives

Description

SPMFPK390: MFPK390 Manbug Lightweight K390

Spyderco

Spyderco has always taken great pride in its efforts to push the envelope of performance by offering exotic blade steels in their knives. With that spirit in mind, they are proud to announce that they are offering a number of best-selling models with blades crafted from K390. Manufactured by Bohler-Uddeholm, K390 MICROCLEAN is a state-of-the-art cold work tool steel produced by the particle metallurgy process. Its advanced alloy mix was specifically developed to provide the extreme wear resistance and high compressive strength needed in industrial cutting, blanking, and punching operations. Despite its toughness, its exceptionally fine, homogeneous microstructure also makes it readily machinable and easy to heat treat. Collectively, these qualities make K390 an outstanding blade material for true steel connoisseurs. Spyderco is proud to feature it on some of their most popular models, which are also distinguished with distinctive blue-colored handles.

Please note: K390 is a high-performance, non-stainless steel that can rust if cared for improperly. Always make sure to clean and dry your blade after use, and apply oil or other rust-inhibiting products if needed.

Specifications

  • Blade Length: 1.97" (50 mm)
  • Closed Length: 2.50" (64 mm)
  • Overall Length: 4.47" (114 mm)
  • Cutting Edge: 1.75" (44 mm)
  • Blade Thickness: 0.098" (2.5 mm)
  • Blade Material: Bohler K390 Tool Steel
  • Blade Style: Clip Point
  • Blade Grind: Full-Flat
  • Blade Finish: Satin
  • Blade Edge: Plain
  • Handle Material: FRN
  • Handle Color: Blue
  • Locking Mechanism: Lockback
  • Pocket Clip: None
  • Model Number: MFPK390
  • Model Name: Manbug Lightweight K390
  • Weight: 0.7 oz. (20 g)
  • Made in Japan

UPC Code: 716104013791

Related Categories

Spyderco Knives, Spyderco Manbug Keychain Folding Knives Series, K390 Blade Steel, Zytel Handle Material, Folding Knives, Folding Knives Lockbacks, Made in Japan

Product Handle Badge: Zytel Handles
Product Lock Type Badge: Lockback
Product Country of Origin Badge: Made in Japan
Spyderco Manbug Lightweight Folding Knife 1.97" K390 Satin Plain Blade, Blue FRN Handlesrated 5.000 stars out of 5 (1 review)
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Spyderco Manbug Lightweight Folding Knife 1.97" K390 Satin Plain Blade, Blue FRN Handles
rated 5 stars out of 5
Michael
Santa Fe, Nm
Feb 19, 2026
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Lock Ease of Use, Lock Type, Overall Quality, Weight
Cons: Handle Material
An excellent tiny EDC knife
I haven't done much with it yet, but it's quite sharp and it's made of an outstanding steel, K390. It's my 2nd Manbug so I know it's sturdy enough to do most anything a blade this size will do. I look forward to not sharpening this one as often.
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