This is the 5.5mm Flat Head Screw Driver from O.S. Speed. FEATURES: Aluminum constructed handle Anodized black in color Size printed on handle for easy identification Hollow handle for storage INCLUDES: One 5.5mm Flat Head Screw Driver SPECS: Total Length: 215.9mm (8.5") Handle Length: 84mm (3.31") Handle Diameter: 14mm (0.55") OS EnginesPart OSM71412300