Flexcut Carvin Jack Pocket Knife Left Handed JKNL91 Style JKNL91. The Carvin Jack is a complete carving kit in your pocket. At 3.5 ounces and a closed length of 4-1/4 inches it features 6 locking edge tools. Each kit also includes a leather belt mounted sheath a custom fit SlipStrop and Gold Polishing compound. The handedness (right or left) of the knife should be chosen by how you carve not necessarily by if you are left or right handed. Choose a right-handed knife if you are right handed and carve with the blade towards you. If you carve away from yourself choose a left-handed knife. Left-handers should choose the inverse.