Kagemusha "Secret Ninja" linerlocking folder. This offering from Katz has a great and hefty blade design with smooth and fast action. The liner is thick and lockup more secure than most knives we see. Made in Japan for Katz of Arizona features XT 80 Stainless Steel, linerlock, one-hand opener, removable pocket clip XT80 Stainless Steel is a proprietary type of steel used by Katz. XT80 tests at 58-59 on the Rockwell "C" scale. With the resilience of this excellent Stainless Steel, it hold and retains an edge to the high standard for which Katz is known for.