1Model: Package includes 18 sockets and 1 adapter, the socket models are EP4, EP5, EP6, EP7, EP8, EP10, EP11, EP12, EP14, EP16, EP18, EP20, EP22, EP24, EP26, EP28, EP30, EP32. 2Unique Design: Deep star design covers greater contact area between the driver and fastener to allow greater torque application with hand tools. 3Material: Sockets are made of drop forged and heat treated chrome vanadium steel, to ensure deformation prevention, black phosphate finish ensure oxidation proof. 4Practical: The sockets maximizes torque transfer and increases tool engagement. Bits are impact ready. Suitable for both hand tool and electric tool. 5Storage Box: Socket set comes in a plastic blow molded case with Ep size engravings for easy storage, organization and portability