SOG Knives & Tools SOG TAC XR, 3.39 Folding Knife, Clip Point Straight Edge, G10 Handle, Cryo D2 Steel, Black Titanium Nitride Finish, Black SOG-12-38-01-41 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.