UPK-D1 PocketSai ULTRA

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 63 makes this the toughest stainless steel available at this hardness, achieving impact and wear resilience at the highest possible capability. 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