Duratrax Metric Socket Head Screw Set FEATURES: Selected sizes commonly used by car, boat and heli modelers Includes a compact ten compartment clear plastic storage case Screws for each co INCLUDES: (10) 3 x 6mm Machine (20) 3mm Nut (10) 3 x 12mm Machine (10) 3mm Lock Nut (10) 3 x 15mm Machine (10) 4mm Lock Nut (6) 3