SOG Pentagon XR Folding Knife - A folding knife designed for defense, the easy to carry SOG Pentagon XR features a 3.66" cryogenically heat-treated CTS XHP stainless steel, wide spear point blade and ultra-grip G10 handle. SOG's XR Lock enables smooth ambidextrous single-handed opening in three different ways with distinguishably solid blade-lock once open with fixed-blade-like feel and confidence. The next level of enhanced pocket knife capability backed by Pentagon's proven pedigree. Features Built For Professionals -The MK3 design leverages feedback from users and aims to improve on all features that are relied on in professional use case situations, with a focus on defensive and combat use. Made For Performance -Includes improved operation of the blade opening, fully ambidextrous operation and configuration of all features, improved blade design, greater hand comfort and upgraded materials. Purposeful Design -Features ambidextrous smooth open and solid locking XR Lock, wide spear point CRYO CTS XHP stainless steel blade and ultra-grip G10 handle for enhanced control. XR Lock - SOG's XR Lock(R) allows for smooth, controlled one-handed opening when intended with kick opener, thumb stud, or holding back the lock and flicking out the blade. Provides the ultimate built-in blade locking security when open, able to withstand 1500 pounds of force. CRYO CTS XHP Steel - A high hardness, corrosion resistant steel that is cryogenically heat-treated to SOG's unique performance specifications. CTS XHP provides the ideal combination of edge retention and durability for heavy use with minimal maintenance. Ambidextrous Design -Designed for single-handed ambidextrous use, with all functions accessible by either hand, including reversible clip mount for left or right-hand carry.