This MK Ultra flipper by Jake Hoback has a etched and tumbled AEB-L stainless steel upswept/tanto blade, notched thumb-rest and flipper. Caged bearing pivot. "Ps23 Hoback" stamped on rear of handle. Handle is comprised of black anodized aluminum with a matching pocket clip positioned for tip up carry, left or right reversible. Has a copper pivot and bead blasted screws. Nice detent, lockup, and blade seating. Knife flips well with absolutely no wrist action needed. Comes with leather pouch and pivot tool. Excellent condition.