Boker-7107GR Automatic Top Lock II Folding Knife With Green Bone Inserts In Handles Is A Very Rare Collectible Knife Of All Times. If you appeciate Top Lock's careful craftsmanship and design detail, but prefer a smaller size, then Top Lock II is for you. All three Top Lock II models, which are patented, feature a 2.75" blade, with 4" overall closed length. The accompanying black Cordura nylon belt sheath can be worn horizontally or vertically.