All parts is well packed and assorted in a box for storage and carry, meeting your different needs for all kind of repair work Manufactured from steel with heat treated for extra strength and durability Ideal for professional mechanics and enthusiasts requiring automotive for frequent bolt/nut adjustments in workshops or home garages 10pieces 12 point bit socket with 1/4inch 3/8inch 1/2inch drive. Precise bit to ensures accurate size Each bit with its size imprinted on bit itself, making it easy to identify after you have removed a handful from the case, Manufacturer: Shunzhong