Introducing the Case 08683 Caribbean Blue Bone (6158LSSM) Mako Knife. This knife features a locking clip blade made of Tru-Sharp surgical steel with a mirror polished finish and a french nail nick for opening. The genuine smooth Caribbean Blue Bone handle, 4 1/4-inches closed, has an etching of a Marlin on the show side and brass bolsters. This Case Mako knife weighs 5.4 ounces and comes with a leather sheath. Discontinued item, BNIB; made in the USA in 2007.