Extra Large 12.5" Black Titanium Stiletto Automatic Knife Bayo. To open the knife,press the button at the top of the black ABS handle. To close, push the titanium t-shaped bolster above the handle toward the base. A slide lock on the handle prevents accidental opening while not in use. Included with this knife is a free black nylon quick release sheath with belt loop. Overall Length: 12.50 Inches, Blade Length: 5.62 Inches