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by UPKnife

UPK-D4 Hybrid SS-Poly

$89.95 $102.00

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

 This version of UPK-D1 Pocket Sai has a HARDENED STAINLESS STEEL Blade and a Composite Polymer Handle

Hybrid Thrower - The combo of a hardened stainless blade with a Polymer handle provides a tough throwable Pocket Sai for practice and training at a reduced cost. A blade made in 440A high carbon martensitic stainless steel with a hardness of HRC40-44 makes a tough resilient stainless made for throwing and can take extreme abuse offering bending where harder alloys will break. This combination is a notable upgrade from the Full Polymer trainer.

Material Specifications:

  • Blade Milled from 440A Stainless Steel
    • Heat Treated to 40-44 HRC
    • 220+ ksi Tensile Strength
  • Handle made in POLYMER
    • 50% Glass-filled Nylon (gun frame material)
    • 9 ksi Tensile Strength
  • Custom Button made in Anodized Aluminum
    • 6061-T6 Aluminum with Red 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)
  • Weight: 4.0 oz.

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