Smith & Wesson OTF 3.6 inch Automatic Knife - In addition to the thumb slide this knife has a safety tab on the side used to retract the spear blade. Don't let the thin profile of this knife fool you, this is an impressive knife made to be a great tactical knife. With it's AUS-8 steel double edge dagger blade, aluminum handle with the right groves to give the handler a better grip. Features a glass breaker, pocket clip and safety lock. Blade Length: 3.60 inch Handle Length: 5.43 inch Overall Length: 8.77 inch Weight: 0.44 lb