Case Barlow Caribbean Blue Bone, Sawcut Jig, 25581, 62009 1/2 SS pocket knife

You open the Case Knives with two hands. To make this easier, there's a nail nick which gives you a little extra grip using your fingernail. This pocket knife is not equipped with a full lock, only with a slipjoint mechanism. This provides some resistance to prevent the knife from snapping shut during normal use. However, if you press on the spine of the blade, the knife will shut.