SureFire Scout Light Pro Shoulder Screw Black. It is a dual-drive screw that accepts a flat-head screw driver or 1/8 inch hex bit. There's no need to source poor quality or misfit parts for Scout Light Pro. SureFire has you covered Specifications for SureFire Scout Light Pro Shoulder Screw: Manufacturer: SureFire Color: Black Fabric/Material: Heat Treated Stainless Steel Finish: Black Oxide Quantity: 1 Weight: 1.6 oz Condition: New Package Contents: SureFire Scout Light Pro Shoulder Screw SureFire Z93: Scout Light Pro Shoulder Screw Black