Pirate Skull Spring Assisted Knife - Liner Locking Tanto Folder Opening - Tophatter's Inc. Weapons Store OnlineThe Pirate Skull symbol took to the seas as a form of shorthand for captains, who noted the sailors who died with a little skull and crossbones next to their name in the ship's log. Fast, Easy Opening. It offers convenient one handed deployment, just nudge the convenient flipper (thumb spur) or the Thumb Stud and watch the blade fly open! Once open, the blade stays securely locked into place with its durable and reliable liner lock. 3" blade, 4 1 2"