www.sog-knives.net At just half the price of the SOG Vision, the Sog X-Ray Vision model XV71 is famous for being tactical and practical. The bead blasted VG-10 tanto blade looks beautiful with its partial serrated design. In the handle of the X-Ray Vision is the famous SOG Arc-Lock that is known for locking the blade up tight and releasing it easily only when initiated by the user. To finish, the handle is made of a textured glass reinforced zytel for nice grip.