UPK-D4 Eclipse Traditional AL

$99.95 $133.00

This UPK-D4 Eclipse has a Type III Hardcoat 7075-T6 Aluminum Blade and Traditional Handle

A minimal guard version of the Pocket Sai. The guards have been reduced to a minimum amount necessary for blade retraction.

  • EDC Defensive Implement
  • The Eclipse Offers Self-sheathing making them easy and safe to carry
  • Inspired by the traditional Okinawan Sai with Yoku removed for a sleek profile
  • Retractable Blade automatically Locks at either position (open/closed)
  • NOT Sharpened, not double-edged (A knife having dual effective cutting edges)
  • Please see The D4T or D4 SS knives for doubled-edged options.

    What’s included?

    x1 Eclipse Traditional AL

    Material Specifications:

    • Blade Milled from 7075-T6 Aluminum
      • Hardcoat Type III Anodized
      • 80 ksi Tensile Strength
    • Traditional Handle Milled from 7075-T6 Aluminum
      • Hardcoat Type III Anodized
      • 80 ksi Tensile Strength
    • Custom Button made in Aluminum
      • 7075-T6 Aluminum with Black, Crimson, or Gold Hardcoat Type III Anodize
    • Custom Screws made in 450 Stainless steel
      • Heat Treated by Age Hardening to the H900 condition HRC 45
    • 301 Stainless Steel Springs
      • Cold work Hardened to a Spring Temper


    • Extended length: 11.7 inches (297 mm)
    • Collapsed length: 7.3 inches (186 mm)

    Important Read:

    7075-T6 Tempered Aluminum is a lightweight aluminum with steel like strength, one of the strongest Aluminum alloys available with a tensile strength as high as 80 ksi.  The Hardcoat Type III Anodize provides a resilient protective surface.

    Customer Reviews

    Based on 6 reviews
    Matt Henry
    Great product!

    I bought this to mount to my rifle as a bayonet, very cool addition and it looks and works great! The customer service was also very helpful as well, I would definitely recommend buying from this seller.

    Brian Schmidt
    Fits and works nicely

    I love the fit and look but I was a little suprised to find the sides are not sharpend at all

    Hey Brian,
    If you would like I am happy to exchange the UPK-D4 Eclipse AL for a UPK-D4T Eclipse Talon, this evolution was created specifically to address the desire for improved capabilities. The Talon adds a hardened HRC:60 Stainless steel double-edged razor tip to the lightweight AL version. Just reach out and I will credit the return towards a sharpened model. I also offer a Full stainless double-edged blade in the UPK-D4 Eclipse SS-AL.
    Thank you for your support,
    John Risch UPKnife

    Don Smith
    UPK D4

    Love the design and function, definitely different. Quality is top notch and the tool that I got has come in handy many times already.

    David Sepulveda
    The best

    Not only is the product top notch, the customer service is the absolute best. Keep up the great work.

    Miguel Morales

    Best gift to my self and almost everybody I know with a new school or old school rifel