Steel construction Black in color.Used on the Traxxas Revo monster truck can also be used in any application where a 3 x 10 mm countersunk screw is required.Includes: Six 3 x 10 mm Traxxas Countersunk Hex Screws.Requires: 2 mm hex head wrench GPMR8011.Length: 10 mm. Diameter: 3 mm.