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by UPKnife

UPK-D1 Pocket Sai Thrower Edition

$174.95 $200.00

Designed with inspiration from the Okinawan Sai, to be a defensive melee weapon that would be more practical to carry and self-sheath.  The Handle slides to eclipse the blade’s edges and point making an integrated sheath.  It's one-button locking mechanism is designed to engage automatically in the open or closed position and must be pressed to unlock it from either end.

 This version of UPK-D1 Pocket Sai is made in 100% HARDENED STAINLESS STEEL

Thrower - optimized for throwing, made in 440A high carbon martensitic stainless steel with a hardness of HRC37-40 makes a tough resilient stainless. It can take extreme abuse and offer a point of bending where harder alloys will break, making this ideal of throwing where the worst abuse takes place.

Traditional Sai- The original Okinawan Sai is a defensive melee weapon optimized for non-lethal techniques used by Okinawan police of feudal Japan to control and subdue, noting that the saki(point) or yoku(prongs) offer pointed tips that could be used when a more lethal need arose.  I chose to shape the monouchi(main blade) of the Pocket Sai with beveled edges that draw to a point at its end giving it a more ominous look and a more effective tip for its compact size.  In respect to the traditional Sai, the Pocket Sai is pointed without live edges, this provides better resilience to weapon-on-weapon impact during melee control techniques.  

Material Specifications:

  • Blade Milled from 440A Stainless Steel
    • Heat Treated to 37-40 HRC
  • Handle made in 440A Stainless Steel 
    • Heat Treated to 37-40 HRC
  • Custom Hardware(Button and 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: 0.5 lb (8 oz.)

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