Made from high quality chrome vanadium steel, heat treated and plated with a corrosion resistant satin chrome finish, durable and long life Easy to use, thumb operated , reverse gear, with 24 teeth and only needs a 5 degree swing arc to achieve the exact seal, built-in push-button ball bearing allows for quick release and quick socket change The most used 1/4" metric sockets from 4 mm to 13 mm for the different demands of your daily life Organizer rack Packaged including 10 pieces of metric sockets, a 1/4" extension bar 4" and 1/4" 24 tooth quick release ratchet Most often used for various DIY assembly and repair tasks as well as maintenance and repair of base of the car, etc