Precision Reflex Armorers Barrel Nut Torq Wrench w/Handle DPMS .308 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. This wrench is 2 sided side A has 4 pins on a 24 hole pattern on a 1.72in bolt circle. Side B is a 20 hole pattern on a 1.56in bolt circle on a .780 radius Specifications for Precision Reflex Armorers Barrel Nut Torq Wrench w/Handle: Manufacturer: Precision Reflex Weight: 1.3 lb Fabric/Material: Steel Color: Black Condition: New Gun Model: DPMS LR-308 Finish: Black Oxide Length: 12 in Package Contents: Precision Reflex Armorers Barrel Nut Torq Wrench w/Handle What firearm models does the manufacturer say Precision Reflex Armorers Barrel Nut Torq Wrench w/Handle is compatible with? The manufacturer suggests that Precision Reflex Armorers Barrel Nut Torq Wrench w/Handle is compatible with DPMS LR-308Precision Reflex 03-0082: Armorers Barrel Nut Torq Wrench w/Handle DPMS .308 Black