UPK-D1 PocketSai ULTRA

$399.95 $450.00

This UPK-D1 PocketSai has a n in-house USA made Blade in Sandvik 14C28N Stainless Steel with a Traditional 440A Stainless Steel Handle

Made in 14C28N Stainless Steel with a hardness of  HRC 61+/-1HRC makes a tough resilient stainless with great hardness. It can take extreme abuse with uses as a  prybar or hammer well within its capabilities.
  • EDC Defensive Implement
  • PocketSai self-sheathing making them easy and safe to carry
  • Inspired by the traditional Okinawan Sai
  • Retractable Blade automatically Locks at either position (open/closed)

What's Included

x1 PocketSai ULTRA

Material Specifications:

  • Blade Milled in-house (US Made) from Sandvik 14C28N Stainless Steel
    • Heat Treated w/ Cryo HRC 62+/-1HRC
    • Blade Differential heat treated for toughness 
  • Handle made in 440A Stainless Steel 
    • Heat Treated to HRC 45
  • 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: 8 oz.

Important Read:

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.