XR LOCK CRYO D2 STEEL MADE FOR PERFORMANCE The go-to folding knife for uniformed professionals, SOG-TAC XR features a 3.4 inch cryogenically heat-treated D2 tool steel blade and ultra-grip G10 handle. SOG*s XR Lock enables smooth ambidextrous single-handed opening in three different ways, with extremely secure blade-lock once open. The next generation of designed and engineered performance in a tactical pocket knife.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }