The sleeve is thick and firm, and it is not easy to deform. The internal structure is completely hollow, which solves the problem of too long screws. The booster rod can be inserted into the booster hole to apply force, and the force is strong. Various specifications and wide application Sleeve finish polishing treatment, beautiful and , not easy to rust, rust-proof treatment. Name: Double-headed wrench socket set Specification: 6-22mm Quantity: 10pcs/set Colour:silver Material:Metal Package Contents: 1 x Double headed wrench socket set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.