Precision Armament M41 Spanner Wrench Stainless Steel Matte Black. Close fitting design provides the best method of installation to avoid damage or marring. Square 3/8 drive socket allows attachment of a torque wrench for precise tightening. Specifications for Precision Armament M41 Spanner Wrench: Manufacturer: Precision Armament Color: Matte Black Length: 8.38 in Weight: 4.5 oz Features of Precision Armament M41 Spanner Wrench: Material: Stainless Steel Finish: Natural Weight: 4.5 oz. Length: 8.38 Drive Socket: 3/8 Max Torque: 60 ft-lbs Package Contents: Precision Armament M41 Spanner Wrench Precision Armament A70001: M41 Spanner Wrench Stainless Steel Matte Black