Features: 1.Excellent material selection, precision heat treatment of the whole, high hardness and impact resistance. 2.Forged with Ming molybdenum steel, durable, can withstand large torque, suitable for electric and pneumatic tools. 3.Blackened surface, rust-proof and corrosion-resistant for long service life. 4.The internal angle design of the conversion sleeve arc, with bolt hole, strong locking force, not easy to slip, easy to use. 5.Various specifications, can be used in different working environments. 6.With four corners arc square head design, this impact socket converter kit features ball bearing for a secure hold. Specification: Condition: 100% Brand New_x000D_ Item Type: Impact Socket Converter Kit_x000D_ Material: CR-MO Chrome Molybdenum Steel_x000D_ Color: As Pictures Shown_x000D_ Application: Suitable for auto repair factory, 4S shop, CNC machine tool, construction site and most of the scenarios where pneumatic and electric tools are used_x000D_ Size:_x000D_ 1/4 in. (Male) x 3/8 in. (Female)_x000D_ 3/8 in. (Male) x 1/2 in. (Female)_x000D_ 3/4 in. (Male) x 1/2 in. (Female)_x000D_ 3/8 in. (Male) x 1/4 in. (Female)_x000D_ 1/2 in. (Male) x 3/8 in. (Female)_x000D_ 1/2 in. (Male) x 3/4 in. (Female) PackageList: 6Pcs/Set x Impact Socket Converter Note: Red and blue boxes are shipped at random.