Features: Superior Quality -- high hardness Cr-Mo material, rust-proof black coating finish, ensure solid durable construction, corrosion resistance, long lifetime. 12 Point Design -- XZN triple square spline bit sockets, provide precise fit between fastening tool and fastener, secure firm lock, more torque than hex socket. 7 Sizes Of Set -- it contains various impact sockets, meeting different demands, 7 common metric size: 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 14mm. Sturdy Storage Case -- all the sockets, with metric size mark, can be well stored in a rugged plastic box, organized, neat, tidy, convenient to carry around. Wide Application --- these impact socket are suitable for 3/8 inch wrenches, widely used in heavy-duty automotive repair and electrical application. Specifications: Material: Cr-Mo Color: Black Socket Size: 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 14mm Package Size: 15*9*5cm / 5.90*3.54*1.96in Package Weight: 455g / 16.04oz Note: Socket set only, others in pictures are not included. Due to manual measurement, there may be deviation. Due to lighting or others, it may slightly differ from pictures. Packing List: 7 * Socket 1 * Carry Box