Benchmade 51 Morpho Balisong Butterfly Knife G-10

Posted: 12/30/2025

Benchmade 51 Morpho Balisong Butterfly Knife G-10

 

The Benchmade 51 Bali-Song (Morpho) is a popular butterfly knife known for its D2 steel blade, Black G10 handles, and blue anodized titanium liners, featuring a 4.25″ blade, 9.35″ overall length, spring-latch lock, and weighing around 3.3 oz, balancing premium materials with lightweight design for flipping and recreation. 

Here are the key specifications for the standard Benchmade 51:
  • Blade:
    • Length: 4.25″ (10.80 cm)
    • Thickness: 0.100″ (2.54 mm)
    • Steel: D2 Tool Steel (60-62 HRC)
    • Style: Crown Modified Spear-Point
    • Finish: Satin (or Black on 51BK)
    • Edge: Plain
  • Handle:
    • Material: Black G10
    • Liners: Jeweled Blue Titanium
    • Thickness: ~0.44″ – 0.48″ (11.17mm – 12.19mm)
  • Dimensions & Weight:
    • Overall Length: 9.35″ (23.75cm)
    • Closed Length: 5.10″ (12.95cm)
    • Weight: 3.3 oz (93.55g)
  • Locking Mechanism: Bali-Song with Spring-Latch
  • Pocket Clip: Blue Anodized Titanium, Tip-Up, Ambidextrous
  • Origin: Made in USA 
Key Features:
  • Lightweight design, good for flipping.
  • Premium materials like D2 steel and titanium liners.
  • Often comes with a blue anodized titanium pocket clip.