The SCHOTF3S Viper Out-the-Front Assisted Opening knife Silver Blade Half Serrated from Schrade features a double-edge blade with a bead blast finish. The handle is dark gray finished aluminum with a safety, pocket clip and glass breaker. To deploy the blade, simply push on the slider near the base of the handle to get the blade moving and the spring assist mechanism will take it the rest of the way. To retract the blade, release the lock and pull down on the slider to lock it back in place. It is assisted automatic deployment and manual retraction. Specifications: Overall Length: 8.75" Blade Length: 3.5" Closed Length: 5.25"