Precision Reflex PRi Armorers Barrel Nut Torq Wrench Armalite Black. The wrench is constructed of 1018 steel with 8 alloy steel pins 4 on each side that are press fit and welded into the wrench handle. The handle accommodates a 3/8 or 1/2in drive torque wrench. The overall length of wrench is 12in and weights 1.3 lbs. The wrench has a black oxide finish. The ID of the wrench is 1.3in. Specifications for Precision Reflex PRi Armorers Barrel Nut Torq Wrench Armalite: Manufacturer: Precision Reflex Weight: 1.3 lb Fabric/Material: 1018 Steel/Steel Alloy Caliber: .308 Winchester Color: Black Finish: Black Oxide Length: 12 in Package Contents: Precision Reflex PRi Armorers Barrel Nut Torq Wrench Armalite Precision Reflex 03-0083: PRi Armorers Barrel Nut Torq Wrench Armalite Black