B09 MercuryThe Kestrel 'Mercury' features a light and resilient frame in anodized, aerospace grade titanium. The blade is in extra strong ZDP 189 steel; the one hand button lock and the thumb stud are stainless steel. The Kestrel is a compact but versatile folder that works and presents beautifully in any situation; the design, which offers a deep finger groove at the intersection between the handle and blade, makes this knife remarkably comfortable in the hand